Merge branch 'master' into 8-10-stable

13 files changed, 486 insertions, 440 deletions

diff --git a/.rubocop.yml b/.rubocop.yml
index 3aac8401848..db0bcfadcf4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,6 +2,8 @@ require:
   - rubocop-rspec
   - ./rubocop/rubocop
 
+inherit_from: .rubocop_todo.yml
+
 AllCops:
   TargetRubyVersion: 2.1
   # Cop names are not displayed in offense messages by default. Change behavior
@@ -52,14 +54,6 @@ Style/AlignArray:
 Style/AlignHash:
   Enabled: true
 
-# Align the parameters of a method call if they span more than one line.
-Style/AlignParameters:
-  Enabled: false
-
-# Use &&/|| instead of and/or.
-Style/AndOr:
-  Enabled: false
-
 # Use `Array#join` instead of `Array#*`.
 Style/ArrayJoin:
   Enabled: true
@@ -80,10 +74,6 @@ Style/Attr:
 Style/BeginBlock:
   Enabled: true
 
-# Checks if usage of %() or %Q() matches configuration.
-Style/BarePercentLiterals:
-  Enabled: false
-
 # Do not use block comments.
 Style/BlockComments:
   Enabled: true
@@ -97,14 +87,6 @@ Style/BlockEndNewline:
 Style/BlockDelimiters:
   Enabled: true
 
-# Enforce braces style around hash parameters.
-Style/BracesAroundHashParameters:
-  Enabled: false
-
-# Avoid explicit use of the case equality operator(===).
-Style/CaseEquality:
-  Enabled: false
-
 # Indentation of when in a case/when/[else/]end.
 Style/CaseIndentation:
   Enabled: true
@@ -133,24 +115,10 @@ Style/ClassMethods:
 Style/ClassVars:
   Enabled: true
 
-# Do not use :: for method call.
-Style/ColonMethodCall:
-  Enabled: false
-
-# Checks formatting of special comments (TODO, FIXME, OPTIMIZE, HACK, REVIEW).
-Style/CommentAnnotation:
-  Enabled: false
-
 # Indentation of comments.
 Style/CommentIndentation:
   Enabled: true
 
-# Use the return value of `if` and `case` statements for assignment to a
-# variable and variable comparison instead of assigning that variable
-# inside of each branch.
-Style/ConditionalAssignment:
-  Enabled: false
-
 # Constants should use SCREAMING_SNAKE_CASE.
 Style/ConstantName:
   Enabled: true
@@ -159,34 +127,14 @@ Style/ConstantName:
 Style/DefWithParentheses:
   Enabled: true
 
-# Checks for use of deprecated Hash methods.
-Style/DeprecatedHashMethods:
-  Enabled: false
-
 # Document classes and non-namespace modules.
 Style/Documentation:
   Enabled: false
 
-# Checks the position of the dot in multi-line method calls.
-Style/DotPosition:
-  Enabled: false
-
-# Checks for uses of double negation (!!).
-Style/DoubleNegation:
-  Enabled: false
-
-# Prefer `each_with_object` over `inject` or `reduce`.
-Style/EachWithObject:
-  Enabled: false
-
 # Align elses and elsifs correctly.
 Style/ElseAlignment:
   Enabled: true
 
-# Avoid empty else-clauses.
-Style/EmptyElse:
-  Enabled: false
-
 # Use empty lines between defs.
 Style/EmptyLineBetweenDefs:
   Enabled: false
@@ -215,10 +163,6 @@ Style/EmptyLinesAroundModuleBody:
 Style/EmptyLinesAroundMethodBody:
   Enabled: false
 
-# Prefer literals to Array.new/Hash.new/String.new.
-Style/EmptyLiteral:
-  Enabled: false
-
 # Avoid the use of END blocks.
 Style/EndBlock:
   Enabled: true
@@ -231,10 +175,6 @@ Style/EndOfLine:
 Style/EvenOdd:
   Enabled: true
 
-# Do not use unnecessary spacing.
-Style/ExtraSpacing:
-  Enabled: false
-
 # Use snake_case for source file names.
 Style/FileName:
   Enabled: true
@@ -252,31 +192,15 @@ Style/FlipFlop:
 Style/For:
   Enabled: true
 
-# Enforce the use of Kernel#sprintf, Kernel#format or String#%.
-Style/FormatString:
-  Enabled: false
-
 # Do not introduce global variables.
 Style/GlobalVars:
   Enabled: true
 
-# Check for conditionals that can be replaced with guard clauses.
-Style/GuardClause:
-  Enabled: false
-
 # Prefer Ruby 1.9 hash syntax `{ a: 1, b: 2 }`
 # over 1.8 syntax `{ :a => 1, :b => 2 }`.
 Style/HashSyntax:
   Enabled: true
 
-# Finds if nodes inside else, which can be converted to elsif.
-Style/IfInsideElse:
-  Enabled: false
-
-# Favor modifier if/unless usage when you have a single-line body.
-Style/IfUnlessModifier:
-  Enabled: false
-
 # Do not use if x; .... Use the ternary operator instead.
 Style/IfWithSemicolon:
   Enabled: true
@@ -299,22 +223,10 @@ Style/IndentationConsistency:
 Style/IndentationWidth:
   Enabled: true
 
-# Checks the indentation of the first element in an array literal.
-Style/IndentArray:
-  Enabled: false
-
-# Checks the indentation of the first key in a hash literal.
-Style/IndentHash:
-  Enabled: false
-
 # Use Kernel#loop for infinite loops.
 Style/InfiniteLoop:
   Enabled: true
 
-# Use the new lambda literal syntax for single-line blocks.
-Style/Lambda:
-  Enabled: false
-
 # Use lambda.call(...) instead of lambda.(...).
 Style/LambdaCall:
   Enabled: true
@@ -323,14 +235,6 @@ Style/LambdaCall:
 Style/LeadingCommentSpace:
   Enabled: true
 
-# Use \ instead of + or << to concatenate two string literals at line end.
-Style/LineEndConcatenation:
-  Enabled: false
-
-# Do not use parentheses for method calls with no arguments.
-Style/MethodCallParentheses:
-  Enabled: false
-
 # Checks if the method definitions have or don't have parentheses.
 Style/MethodDefParentheses:
   Enabled: true
@@ -387,39 +291,18 @@ Style/MultilineMethodDefinitionBraceLayout:
 Style/MultilineOperationIndentation:
   Enabled: false
 
-# Avoid multi-line `? :` (the ternary operator), use if/unless instead.
-Style/MultilineTernaryOperator:
-  Enabled: false
-
-# Do not assign mutable objects to constants.
-Style/MutableConstant:
-  Enabled: false
-
 # Favor unless over if for negative conditions (or control flow or).
 Style/NegatedIf:
   Enabled: true
 
-# Favor until over while for negative conditions.
-Style/NegatedWhile:
-  Enabled: false
-
 # Avoid using nested modifiers.
 Style/NestedModifier:
   Enabled: true
 
-# Parenthesize method calls which are nested inside the argument list of
-# another parenthesized method call.
-Style/NestedParenthesizedCalls:
-  Enabled: false
-
 # Use one expression per branch in a ternary operator.
 Style/NestedTernaryOperator:
   Enabled: true
 
-# Use `next` to skip iteration instead of a condition at the end.
-Style/Next:
-  Enabled: false
-
 # Prefer x.nil? to x == nil.
 Style/NilComparison:
   Enabled: true
@@ -444,51 +327,10 @@ Style/OneLineConditional:
 Style/OpMethod:
   Enabled: true
 
-# Check for simple usages of parallel assignment. It will only warn when
-# the number of variables matches on both sides of the assignment.
-Style/ParallelAssignment:
-  Enabled: false
-
 # Don't use parentheses around the condition of an if/unless/while.
 Style/ParenthesesAroundCondition:
   Enabled: true
 
-# Use `%`-literal delimiters consistently.
-Style/PercentLiteralDelimiters:
-  Enabled: false
-
-# Checks if uses of %Q/%q match the configured preference.
-Style/PercentQLiterals:
-  Enabled: false
-
-# Avoid Perl-style regex back references.
-Style/PerlBackrefs:
-  Enabled: false
-
-# Check the names of predicate methods.
-Style/PredicateName:
-  Enabled: false
-
-# Use proc instead of Proc.new.
-Style/Proc:
-  Enabled: false
-
-# Checks the arguments passed to raise/fail.
-Style/RaiseArgs:
-  Enabled: false
-
-# Don't use begin blocks when they are not needed.
-Style/RedundantBegin:
-  Enabled: false
-
-# Checks for an obsolete RuntimeException argument in raise/fail.
-Style/RedundantException:
-  Enabled: false
-
-# Checks usages of Object#freeze on immutable objects.
-Style/RedundantFreeze:
-  Enabled: false
-
 # Checks for parentheses that seem not to serve any purpose.
 Style/RedundantParentheses:
   Enabled: true
@@ -497,24 +339,6 @@ Style/RedundantParentheses:
 Style/RedundantReturn:
   Enabled: true
 
-# Don't use self where it's not needed.
-Style/RedundantSelf:
-  Enabled: false
-
-# Use %r for regular expressions matching more than `MaxSlashes` '/'
-# characters. Use %r only for regular expressions matching more
-# than `MaxSlashes` '/' character.
-Style/RegexpLiteral:
-  Enabled: false
-
-# Avoid using rescue in its modifier form.
-Style/RescueModifier:
-  Enabled: false
-
-# Checks for places where self-assignment shorthand should have been used.
-Style/SelfAssignment:
-  Enabled: false
-
 # Don't use semicolons to terminate expressions.
 Style/Semicolon:
   Enabled: true
@@ -524,14 +348,6 @@ Style/SignalException:
   EnforcedStyle: only_raise
   Enabled: true
 
-# Enforces the names of some block params.
-Style/SingleLineBlockParams:
-  Enabled: false
-
-# Avoid single-line methods.
-Style/SingleLineMethods:
-  Enabled: false
-
 # Use spaces after colons.
 Style/SpaceAfterColon:
   Enabled: true
@@ -553,11 +369,6 @@ Style/SpaceAfterNot:
 Style/SpaceAfterSemicolon:
   Enabled: true
 
-# Checks that the equals signs in parameter default assignments have or don't
-# have surrounding space depending on configuration.
-Style/SpaceAroundEqualsInParameterDefault:
-  Enabled: false
-
 # Use a space around keywords if appropriate.
 Style/SpaceAroundKeyword:
   Enabled: true
@@ -566,10 +377,6 @@ Style/SpaceAroundKeyword:
 Style/SpaceAroundOperators:
   Enabled: true
 
-# Checks that the left block brace has or doesn't have space before it.
-Style/SpaceBeforeBlockBraces:
-  Enabled: false
-
 # No spaces before commas.
 Style/SpaceBeforeComma:
   Enabled: true
@@ -578,33 +385,14 @@ Style/SpaceBeforeComma:
 Style/SpaceBeforeComment:
   Enabled: true
 
-# Checks that exactly one space is used between a method name and the first
-# argument for method calls without parentheses.
-Style/SpaceBeforeFirstArg:
-  Enabled: false
-
 # No spaces before semicolons.
 Style/SpaceBeforeSemicolon:
   Enabled: true
 
-# Checks that block braces have or don't have surrounding space.
-# For blocks taking parameters, checks that the left brace has or doesn't
-# have trailing space.
-Style/SpaceInsideBlockBraces:
-  Enabled: false
-
-# No spaces after [ or before ].
-Style/SpaceInsideBrackets:
-  Enabled: false
-
 # Use spaces inside hash literal braces - or don't.
 Style/SpaceInsideHashLiteralBraces:
   Enabled: true
 
-# No spaces after ( or before ).
-Style/SpaceInsideParens:
-  Enabled: false
-
 # No spaces inside range literals.
 Style/SpaceInsideRangeLiteral:
   Enabled: true
@@ -614,10 +402,6 @@ Style/SpaceInsideStringInterpolation:
   EnforcedStyle: no_space
   Enabled: true
 
-# Avoid Perl-style global variables.
-Style/SpecialGlobalVars:
-  Enabled: false
-
 # Check for the usage of parentheses around stabby lambda arguments.
 Style/StabbyLambdaParentheses:
   EnforcedStyle: require_parentheses
@@ -627,25 +411,12 @@ Style/StabbyLambdaParentheses:
 Style/StringLiterals:
   Enabled: false
 
-# Checks if uses of quotes inside expressions in interpolated strings match the
-# configured preference.
-Style/StringLiteralsInInterpolation:
-  Enabled: false
-
 # Checks if configured preferred methods are used over non-preferred.
 Style/StringMethods:
   PreferredMethods:
     intern: to_sym
   Enabled: true
 
-# Use %i or %I for arrays of symbols.
-Style/SymbolArray:
-  Enabled: false
-
-# Use symbols as procs instead of blocks when possible.
-Style/SymbolProc:
-  Enabled: false
-
 # No hard tabs.
 Style/Tab:
   Enabled: true
@@ -654,40 +425,10 @@ Style/Tab:
 Style/TrailingBlankLines:
   Enabled: true
 
-# Checks for trailing comma in array and hash literals.
-Style/TrailingCommaInLiteral:
-  Enabled: false
-
-# Checks for trailing comma in argument lists.
-Style/TrailingCommaInArguments:
-  Enabled: false
-
-# Avoid trailing whitespace.
-Style/TrailingWhitespace:
-  Enabled: false
-
-# Checks for the usage of unneeded trailing underscores at the end of
-# parallel variable assignment.
-Style/TrailingUnderscoreVariable:
-  Enabled: false
-
-# Prefer attr_* methods to trivial readers/writers.
-Style/TrivialAccessors:
-  Enabled: false
-
-# Do not use unless with else. Rewrite these with the positive case first.
-Style/UnlessElse:
-  Enabled: false
-
 # Checks for %W when interpolation is not needed.
 Style/UnneededCapitalW:
   Enabled: true
 
-# TODO: Enable UnneededInterpolation Cop.
-# Checks for strings that are just an interpolated expression.
-Style/UnneededInterpolation:
-  Enabled: false
-
 # Checks for %q/%Q when single quotes or double quotes would do.
 Style/UnneededPercentQ:
   Enabled: false
@@ -717,12 +458,6 @@ Style/WhileUntilModifier:
 Style/WordArray:
   Enabled: false
 
-# TODO: Enable ZeroLengthPredicate Cop.
-# Use #empty? when testing for objects of length 0.
-Style/ZeroLengthPredicate:
-  Enabled: false
-
-
 #################### Metrics ################################
 
 # A calculated magnitude based on number of assignments,
@@ -776,15 +511,6 @@ Metrics/PerceivedComplexity:
 Lint/AmbiguousOperator:
   Enabled: true
 
-# Checks for ambiguous regexp literals in the first argument of a method
-# invocation without parentheses.
-Lint/AmbiguousRegexpLiteral:
-  Enabled: false
-
-# Don't use assignment in conditions.
-Lint/AssignmentInCondition:
-  Enabled: false
-
 # Align block ends correctly.
 Lint/BlockAlignment:
   Enabled: true
@@ -810,14 +536,6 @@ Lint/DefEndAlignment:
 Lint/DeprecatedClassMethods:
   Enabled: true
 
-# Check for duplicate method definitions.
-Lint/DuplicateMethods:
-  Enabled: false
-
-# Check for duplicate keys in hash literals.
-Lint/DuplicatedKey:
-  Enabled: false
-
 # Check for immutable argument given to each_with_object.
 Lint/EachWithObjectArgument:
   Enabled: true
@@ -830,10 +548,6 @@ Lint/ElseLayout:
 Lint/EmptyEnsure:
   Enabled: true
 
-# Checks for empty string interpolation.
-Lint/EmptyInterpolation:
-  Enabled: false
-
 # Align ends correctly.
 Lint/EndAlignment:
   Enabled: true
@@ -858,21 +572,11 @@ Lint/FloatOutOfRange:
 Lint/FormatParameterMismatch:
   Enabled: true
 
-# Don't suppress exception.
-Lint/HandleExceptions:
-  Enabled: false
-
 # Checks for adjacent string literals on the same line, which could better be
 # represented as a single string literal.
 Lint/ImplicitStringConcatenation:
   Enabled: true
 
-# TODO: Enable IneffectiveAccessModifier Cop.
-# Checks for attempts to use `private` or `protected` to set the visibility
-# of a class method, which does not work.
-Lint/IneffectiveAccessModifier:
-  Enabled: false
-
 # Checks for invalid character literals with a non-escaped whitespace
 # character.
 Lint/InvalidCharacterLiteral:
@@ -886,11 +590,6 @@ Lint/LiteralInCondition:
 Lint/LiteralInInterpolation:
   Enabled: true
 
-# Use Kernel#loop with break rather than begin/end/until or begin/end/while
-# for post-loop tests.
-Lint/Loop:
-  Enabled: false
-
 # Do not use nested method definitions.
 Lint/NestedMethodDefinition:
   Enabled: true
@@ -916,13 +615,8 @@ Lint/RequireParentheses:
 Lint/RescueException:
   Enabled: true
 
-# Do not use the same name as outer local variable for block arguments
-# or block local variables.
-Lint/ShadowingOuterLocalVariable:
-  Enabled: false
-
-# 'Checks for Object#to_s usage in string interpolation.
-Lint/StringConversionInInterpolation:
+# Checks for the order which exceptions are rescued to avoid rescueing a less specific exception before a more specific exception.
+Lint/ShadowedException:
   Enabled: false
 
 # Do not use prefix `_` for a variable that is used.
@@ -935,22 +629,10 @@ Lint/UnderscorePrefixedVariableName:
 Lint/UnneededDisable:
   Enabled: false
 
-# Checks for unused block arguments.
-Lint/UnusedBlockArgument:
-  Enabled: false
-
-# Checks for unused method arguments.
-Lint/UnusedMethodArgument:
-  Enabled: false
-
 # Unreachable code.
 Lint/UnreachableCode:
   Enabled: true
 
-# Checks for useless access modifiers.
-Lint/UselessAccessModifier:
-  Enabled: false
-
 # Checks for useless assignment to a local variable.
 Lint/UselessAssignment:
   Enabled: true
@@ -983,11 +665,6 @@ Performance/Casecmp:
 Performance/DoubleStartEndWith:
   Enabled: true
 
-# TODO: Enable EndWith Cop.
-# Use `end_with?` instead of a regex match anchored to the end of a string.
-Performance/EndWith:
-  Enabled: false
-
 # Use `strip` instead of `lstrip.rstrip`.
 Performance/LstripRstrip:
   Enabled: true
@@ -996,24 +673,6 @@ Performance/LstripRstrip:
 Performance/RangeInclude:
   Enabled: true
 
-# TODO: Enable RedundantBlockCall Cop.
-# Use `yield` instead of `block.call`.
-Performance/RedundantBlockCall:
-  Enabled: false
-
-# TODO: Enable RedundantMatch Cop.
-# Use `=~` instead of `String#match` or `Regexp#match` in a context where the
-# returned `MatchData` is not needed.
-Performance/RedundantMatch:
-  Enabled: false
-
-# TODO: Enable RedundantMerge Cop.
-# Use `Hash#[]=`, rather than `Hash#merge!` with a single key-value pair.
-Performance/RedundantMerge:
-  # Max number of key-value pairs to consider an offense
-  MaxKeyValuePairs: 2
-  Enabled: false
-
 # Use `sort` instead of `sort_by { |x| x }`.
 Performance/RedundantSortBy:
   Enabled: true
@@ -1082,18 +741,6 @@ Rails/ReadWriteAttribute:
 Rails/ScopeArgs:
   Enabled: true
 
-# Checks the correct usage of time zone aware methods.
-# http://danilenko.org/2012/7/6/rails_timezones
-Rails/TimeZone:
-  Enabled: false
-
-# Use validates :attribute, hash of validations.
-Rails/Validation:
-  Enabled: false
-
-Rails/UniqBeforePluck:
-  Enabled: false
-
 ##################### RSpec ##################################
 
 # Check that instances are not being stubbed globally.
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
new file mode 100644
index 00000000000..9310e711889
--- /dev/null
+++ b/.rubocop_todo.yml
@@ -0,0 +1,462 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config --exclude-limit 0`
+# on 2016-07-13 12:36:08 -0600 using RuboCop version 0.41.2.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 154
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+
+# Offense count: 43
+# Configuration parameters: AllowSafeAssignment.
+Lint/AssignmentInCondition:
+  Enabled: false
+
+# Offense count: 14
+Lint/HandleExceptions:
+  Enabled: false
+
+# Offense count: 21
+Lint/IneffectiveAccessModifier:
+  Enabled: false
+
+# Offense count: 2
+Lint/Loop:
+  Enabled: false
+
+# Offense count: 15
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Lint/StringConversionInInterpolation:
+  Enabled: false
+
+# Offense count: 44
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
+Lint/UnusedBlockArgument:
+  Enabled: false
+
+# Offense count: 129
+# Cop supports --auto-correct.
+# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods.
+Lint/UnusedMethodArgument:
+  Enabled: false
+
+# Offense count: 11
+Lint/UselessAccessModifier:
+  Enabled: false
+
+# Offense count: 12
+# Cop supports --auto-correct.
+Performance/PushSplat:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Performance/RedundantBlockCall:
+  Enabled: false
+
+# Offense count: 4
+# Cop supports --auto-correct.
+Performance/RedundantMatch:
+  Enabled: false
+
+# Offense count: 24
+# Cop supports --auto-correct.
+# Configuration parameters: MaxKeyValuePairs.
+Performance/RedundantMerge:
+  Enabled: false
+
+# Offense count: 60
+Rails/OutputSafety:
+  Enabled: false
+
+# Offense count: 128
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: strict, flexible
+Rails/TimeZone:
+  Enabled: false
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: Include.
+# Include: app/models/**/*.rb
+Rails/Validation:
+  Enabled: false
+
+# Offense count: 217
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
+# SupportedStyles: with_first_parameter, with_fixed_indentation
+Style/AlignParameters:
+  Enabled: false
+
+# Offense count: 32
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: always, conditionals
+Style/AndOr:
+  Enabled: false
+
+# Offense count: 47
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: percent_q, bare_percent
+Style/BarePercentLiterals:
+  Enabled: false
+
+# Offense count: 258
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: braces, no_braces, context_dependent
+Style/BracesAroundHashParameters:
+  Enabled: false
+
+# Offense count: 5
+Style/CaseEquality:
+  Enabled: false
+
+# Offense count: 19
+# Cop supports --auto-correct.
+Style/ColonMethodCall:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: Keywords.
+# Keywords: TODO, FIXME, OPTIMIZE, HACK, REVIEW
+Style/CommentAnnotation:
+  Enabled: false
+
+# Offense count: 34
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, SingleLineConditionsOnly.
+# SupportedStyles: assign_to_condition, assign_inside_condition
+Style/ConditionalAssignment:
+  Enabled: false
+
+# Offense count: 789
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: leading, trailing
+Style/DotPosition:
+  Enabled: false
+
+# Offense count: 13
+Style/DoubleNegation:
+  Enabled: false
+
+# Offense count: 3
+Style/EachWithObject:
+  Enabled: false
+
+# Offense count: 30
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: empty, nil, both
+Style/EmptyElse:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/EmptyLiteral:
+  Enabled: false
+
+# Offense count: 123
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment, ForceEqualSignAlignment.
+Style/ExtraSpacing:
+  Enabled: false
+
+# Offense count: 7
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: format, sprintf, percent
+Style/FormatString:
+  Enabled: false
+
+# Offense count: 48
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Enabled: false
+
+# Offense count: 11
+Style/IfInsideElse:
+  Enabled: false
+
+# Offense count: 177
+# Cop supports --auto-correct.
+# Configuration parameters: MaxLineLength.
+Style/IfUnlessModifier:
+  Enabled: false
+
+# Offense count: 52
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
+# SupportedStyles: special_inside_parentheses, consistent, align_brackets
+Style/IndentArray:
+  Enabled: false
+
+# Offense count: 89
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
+# SupportedStyles: special_inside_parentheses, consistent, align_braces
+Style/IndentHash:
+  Enabled: false
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: line_count_dependent, lambda, literal
+Style/Lambda:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Style/LineEndConcatenation:
+  Enabled: false
+
+# Offense count: 13
+# Cop supports --auto-correct.
+Style/MethodCallParentheses:
+  Enabled: false
+
+# Offense count: 3
+Style/MultilineTernaryOperator:
+  Enabled: false
+
+# Offense count: 62
+# Cop supports --auto-correct.
+Style/MutableConstant:
+  Enabled: false
+
+# Offense count: 10
+# Cop supports --auto-correct.
+Style/NestedParenthesizedCalls:
+  Enabled: false
+
+# Offense count: 12
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
+# SupportedStyles: skip_modifier_ifs, always
+Style/Next:
+  Enabled: false
+
+# Offense count: 8
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedOctalStyle, SupportedOctalStyles.
+# SupportedOctalStyles: zero_with_o, zero_only
+Style/NumericLiteralPrefix:
+  Enabled: false
+
+# Offense count: 29
+# Cop supports --auto-correct.
+Style/ParallelAssignment:
+  Enabled: false
+
+# Offense count: 208
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
+Style/PercentLiteralDelimiters:
+  Enabled: false
+
+# Offense count: 11
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: lower_case_q, upper_case_q
+Style/PercentQLiterals:
+  Enabled: false
+
+# Offense count: 13
+# Cop supports --auto-correct.
+Style/PerlBackrefs:
+  Enabled: false
+
+# Offense count: 32
+# Configuration parameters: NamePrefix, NamePrefixBlacklist, NameWhitelist.
+# NamePrefix: is_, has_, have_
+# NamePrefixBlacklist: is_, has_, have_
+# NameWhitelist: is_a?
+Style/PredicateName:
+  Enabled: false
+
+# Offense count: 28
+# Cop supports --auto-correct.
+Style/PreferredHashMethods:
+  Enabled: false
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Style/Proc:
+  Enabled: false
+
+# Offense count: 20
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: compact, exploded
+Style/RaiseArgs:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/RedundantBegin:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/RedundantException:
+  Enabled: false
+
+# Offense count: 23
+# Cop supports --auto-correct.
+Style/RedundantFreeze:
+  Enabled: false
+
+# Offense count: 377
+# Cop supports --auto-correct.
+Style/RedundantSelf:
+  Enabled: false
+
+# Offense count: 94
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, AllowInnerSlashes.
+# SupportedStyles: slashes, percent_r, mixed
+Style/RegexpLiteral:
+  Enabled: false
+
+# Offense count: 17
+# Cop supports --auto-correct.
+Style/RescueModifier:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+Style/SelfAssignment:
+  Enabled: false
+
+# Offense count: 2
+# Configuration parameters: Methods.
+# Methods: {"reduce"=>["a", "e"]}, {"inject"=>["a", "e"]}
+Style/SingleLineBlockParams:
+  Enabled: false
+
+# Offense count: 50
+# Cop supports --auto-correct.
+# Configuration parameters: AllowIfMethodIsEmpty.
+Style/SingleLineMethods:
+  Enabled: false
+
+# Offense count: 14
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: space, no_space
+Style/SpaceAroundEqualsInParameterDefault:
+  Enabled: false
+
+# Offense count: 119
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: space, no_space
+Style/SpaceBeforeBlockBraces:
+  Enabled: false
+
+# Offense count: 11
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Style/SpaceBeforeFirstArg:
+  Enabled: false
+
+# Offense count: 130
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, EnforcedStyleForEmptyBraces, SpaceBeforeBlockParameters.
+# SupportedStyles: space, no_space
+Style/SpaceInsideBlockBraces:
+  Enabled: false
+
+# Offense count: 98
+# Cop supports --auto-correct.
+Style/SpaceInsideBrackets:
+  Enabled: false
+
+# Offense count: 60
+# Cop supports --auto-correct.
+Style/SpaceInsideParens:
+  Enabled: false
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Style/SpaceInsidePercentLiteralDelimiters:
+  Enabled: false
+
+# Offense count: 36
+# Cop supports --auto-correct.
+# Configuration parameters: SupportedStyles.
+# SupportedStyles: use_perl_names, use_english_names
+Style/SpecialGlobalVars:
+  EnforcedStyle: use_perl_names
+
+# Offense count: 30
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+# SupportedStyles: single_quotes, double_quotes
+Style/StringLiteralsInInterpolation:
+  Enabled: false
+
+# Offense count: 24
+# Cop supports --auto-correct.
+# Configuration parameters: IgnoredMethods.
+# IgnoredMethods: respond_to, define_method
+Style/SymbolProc:
+  Enabled: false
+
+# Offense count: 23
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline, SupportedStyles.
+# SupportedStyles: comma, consistent_comma, no_comma
+Style/TrailingCommaInArguments:
+  Enabled: false
+
+# Offense count: 113
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyleForMultiline, SupportedStyles.
+# SupportedStyles: comma, consistent_comma, no_comma
+Style/TrailingCommaInLiteral:
+  Enabled: false
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: AllowNamedUnderscoreVariables.
+Style/TrailingUnderscoreVariable:
+  Enabled: false
+
+# Offense count: 90
+# Cop supports --auto-correct.
+Style/TrailingWhitespace:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: ExactNameMatch, AllowPredicates, AllowDSLWriters, IgnoreClassMethods, Whitelist.
+# Whitelist: to_ary, to_a, to_c, to_enum, to_h, to_hash, to_i, to_int, to_io, to_open, to_path, to_proc, to_r, to_regexp, to_str, to_s, to_sym
+Style/TrivialAccessors:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/UnlessElse:
+  Enabled: false
+
+# Offense count: 13
+# Cop supports --auto-correct.
+Style/UnneededInterpolation:
+  Enabled: false
+
+# Offense count: 8
+# Cop supports --auto-correct.
+Style/ZeroLengthPredicate:
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index ee23f712f05..ecbf6fd3dc4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -299,7 +299,7 @@ group :development, :test do
   gem 'spring-commands-spinach',  '~> 1.1.0'
   gem 'spring-commands-teaspoon', '~> 0.0.2'
 
-  gem 'rubocop', '~> 0.40.0', require: false
+  gem 'rubocop', '~> 0.41.2', require: false
   gem 'rubocop-rspec', '~> 1.5.0', require: false
   gem 'scss_lint', '~> 0.47.0', require: false
   gem 'simplecov', '~> 0.11.0', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 67c0645c3d9..8430881e677 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
       faraday_middleware-multi_json (~> 0.0)
       oauth2 (~> 1.0)
     asciidoctor (1.5.3)
-    ast (2.2.0)
+    ast (2.3.0)
     attr_encrypted (3.0.1)
       encryptor (~> 3.0.0)
     attr_required (1.0.0)
@@ -473,7 +473,7 @@ GEM
     orm_adapter (0.5.0)
     paranoia (2.1.4)
       activerecord (~> 4.0)
-    parser (2.3.1.0)
+    parser (2.3.1.2)
       ast (~> 2.2)
     pg (0.18.4)
     pkg-config (1.1.7)
@@ -606,8 +606,8 @@ GEM
     rspec-retry (0.4.5)
       rspec-core
     rspec-support (3.5.0)
-    rubocop (0.40.0)
-      parser (>= 2.3.1.0, < 3.0)
+    rubocop (0.41.2)
+      parser (>= 2.3.1.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
@@ -758,7 +758,7 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.2)
-    unicode-display_width (1.0.5)
+    unicode-display_width (1.1.0)
     unicorn (4.9.0)
       kgio (~> 2.6)
       rack
@@ -937,7 +937,7 @@ DEPENDENCIES
   rqrcode-rails3 (~> 0.1.7)
   rspec-rails (~> 3.5.0)
   rspec-retry (~> 0.4.5)
-  rubocop (~> 0.40.0)
+  rubocop (~> 0.41.2)
   rubocop-rspec (~> 1.5.0)
   ruby-fogbugz (~> 0.2.1)
   sanitize (~> 2.0)
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index f7ada5cfee4..b6e80762e3c 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -119,10 +119,6 @@ class Projects::IssuesController < Projects::ApplicationController
         render json: @issue.to_json(include: { milestone: {}, assignee: { methods: :avatar_url }, labels: { methods: :text_color } })
       end
     end
-
-  rescue ActiveRecord::StaleObjectError
-    @conflict = true
-    render :edit
   end
 
   def referenced_merge_requests
@@ -220,7 +216,7 @@ class Projects::IssuesController < Projects::ApplicationController
   def issue_params
     params.require(:issue).permit(
       :title, :assignee_id, :position, :description, :confidential,
-      :milestone_id, :due_date, :state_event, :task_num, :lock_version, label_ids: []
+      :milestone_id, :due_date, :state_event, :task_num, label_ids: []
     )
   end
 
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index 2deb7959700..df659bb8c3b 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -196,9 +196,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     else
       render "edit"
     end
-  rescue ActiveRecord::StaleObjectError
-    @conflict = true
-    render :edit
   end
 
   def remove_wip
@@ -427,7 +424,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       :title, :assignee_id, :source_project_id, :source_branch,
       :target_project_id, :target_branch, :milestone_id,
       :state_event, :description, :task_num, :force_remove_source_branch,
-      :lock_version, label_ids: []
+      label_ids: []
     )
   end
 
diff --git a/app/models/concerns/issuable.rb b/app/models/concerns/issuable.rb
index fb49bd7dd64..acb6f5a2998 100644
--- a/app/models/concerns/issuable.rb
+++ b/app/models/concerns/issuable.rb
@@ -87,12 +87,6 @@ module Issuable
       User.find(assignee_id_was).update_cache_counts if assignee_id_was
       assignee.update_cache_counts if assignee
     end
-
-    # We want to use optimistic lock for cases when only title or description are involved
-    # http://api.rubyonrails.org/classes/ActiveRecord/Locking/Optimistic.html
-    def locking_enabled?
-      title_changed? || description_changed?
-    end
   end
 
   module ClassMethods
diff --git a/app/views/shared/issuable/_form.html.haml b/app/views/shared/issuable/_form.html.haml
index 07b39c233b1..a8a8426df52 100644
--- a/app/views/shared/issuable/_form.html.haml
+++ b/app/views/shared/issuable/_form.html.haml
@@ -1,12 +1,5 @@
 = form_errors(issuable)
 
-- if @conflict
-  .alert.alert-danger
-    Someone edited the #{issuable.class.model_name.human.downcase} the same time you did.
-    Please check out
-    = link_to "the #{issuable.class.model_name.human.downcase}", polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable]), target: "_blank"
-    and make sure your changes will not unintentionally remove theirs
-
 .form-group
   = f.label :title, class: 'control-label'
   .col-sm-10
@@ -142,5 +135,3 @@
         = link_to 'Delete', polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable]), data: { confirm: "#{issuable.class.name.titleize} will be removed! Are you sure?" },
                                                                                                   method: :delete, class: 'btn btn-danger btn-grouped'
       = link_to 'Cancel', polymorphic_path([@project.namespace.becomes(Namespace), @project, issuable]), class: 'btn btn-grouped btn-cancel'
-
-= f.hidden_field :lock_version
diff --git a/db/migrate/20160707104333_add_lock_to_issuables.rb b/db/migrate/20160707104333_add_lock_to_issuables.rb
deleted file mode 100644
index cb516672800..00000000000
--- a/db/migrate/20160707104333_add_lock_to_issuables.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLockToIssuables < ActiveRecord::Migration
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default :issues, :lock_version, :integer, default: 0
-    add_column_with_default :merge_requests, :lock_version, :integer, default: 0
-  end
-
-  def down
-    remove_column :issues, :lock_version
-    remove_column :merge_requests, :lock_version
-  end
-end
diff --git a/db/schema.rb b/db/schema.rb
index f24e47b85b2..8c12898eec9 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -70,11 +70,11 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.string   "recaptcha_site_key"
     t.string   "recaptcha_private_key"
     t.integer  "metrics_port",                          default: 8089
+    t.boolean  "akismet_enabled",                       default: false
+    t.string   "akismet_api_key"
     t.integer  "metrics_sample_interval",               default: 15
     t.boolean  "sentry_enabled",                        default: false
     t.string   "sentry_dsn"
-    t.boolean  "akismet_enabled",                       default: false
-    t.string   "akismet_api_key"
     t.boolean  "email_author_in_body",                  default: false
     t.integer  "default_group_visibility"
     t.boolean  "repository_checks_enabled",             default: false
@@ -84,10 +84,10 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.string   "health_check_access_token"
     t.boolean  "send_user_confirmation_email",          default: false
     t.integer  "container_registry_token_expire_delay", default: 5
+    t.boolean  "user_default_external",                 default: false,        null: false
     t.text     "after_sign_up_text"
     t.string   "repository_storage",                    default: "default"
     t.string   "enabled_git_access_protocol"
-    t.boolean  "user_default_external",                 default: false,       null: false
   end
 
   create_table "audit_events", force: :cascade do |t|
@@ -165,8 +165,8 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.text     "artifacts_metadata"
     t.integer  "erased_by_id"
     t.datetime "erased_at"
-    t.datetime "artifacts_expire_at"
     t.string   "environment"
+    t.datetime "artifacts_expire_at"
     t.integer  "artifacts_size"
   end
 
@@ -481,11 +481,10 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.string   "state"
     t.integer  "iid"
     t.integer  "updated_by_id"
-    t.integer  "moved_to_id"
     t.boolean  "confidential",  default: false
     t.datetime "deleted_at"
     t.date     "due_date"
-    t.integer  "lock_version",  default: 0,     null: false
+    t.integer  "moved_to_id"
   end
 
   add_index "issues", ["assignee_id"], name: "index_issues_on_assignee_id", using: :btree
@@ -625,7 +624,6 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.integer  "merge_user_id"
     t.string   "merge_commit_sha"
     t.datetime "deleted_at"
-    t.integer  "lock_version",              default: 0,     null: false
   end
 
   add_index "merge_requests", ["assignee_id"], name: "index_merge_requests_on_assignee_id", using: :btree
@@ -775,10 +773,10 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.integer  "user_id",                    null: false
     t.string   "token",                      null: false
     t.string   "name",                       null: false
-    t.boolean  "revoked",    default: false
-    t.datetime "expires_at"
     t.datetime "created_at",                 null: false
     t.datetime "updated_at",                 null: false
+    t.boolean  "revoked",    default: false
+    t.datetime "expires_at"
   end
 
   add_index "personal_access_tokens", ["token"], name: "index_personal_access_tokens_on_token", unique: true, using: :btree
@@ -898,9 +896,9 @@ ActiveRecord::Schema.define(version: 20160712171823) do
     t.string   "type"
     t.string   "title"
     t.integer  "project_id"
-    t.datetime "created_at",                               null: false
-    t.datetime "updated_at",                               null: false
-    t.boolean  "active",                                   null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.boolean  "active",                default: false,    null: false
     t.text     "properties"
     t.boolean  "template",              default: false
     t.boolean  "push_events",           default: true
diff --git a/features/project/merge_requests.feature b/features/project/merge_requests.feature
index 8176ec5ab45..21768c15c17 100644
--- a/features/project/merge_requests.feature
+++ b/features/project/merge_requests.feature
@@ -89,7 +89,7 @@ Feature: Project Merge Requests
     Then The list should be sorted by "Oldest updated"
 
   @javascript
-  Scenario: Visiting Merge Requests from a different Project after sorting
+  Scenario: Visiting Merge Requests from a differente Project after sorting
     Given I visit project "Shop" merge requests page
     And I sort the list by "Oldest updated"
     And I visit dashboard merge requests page
diff --git a/spec/features/issues_spec.rb b/spec/features/issues_spec.rb
index 3fec75a07df..d00cffa4e2b 100644
--- a/spec/features/issues_spec.rb
+++ b/spec/features/issues_spec.rb
@@ -120,17 +120,6 @@ describe 'Issues', feature: true do
           expect(page).to have_content date.to_s(:medium)
         end
       end
-
-      it 'warns about version conflict' do
-        issue.update(title: "New title")
-
-        fill_in 'issue_title', with: 'bug 345'
-        fill_in 'issue_description', with: 'bug description'
-
-        click_button 'Save changes'
-
-        expect(page).to have_content 'Someone edited the issue the same time you did'
-      end
     end
   end
 
diff --git a/spec/features/merge_requests/edit_mr_spec.rb b/spec/features/merge_requests/edit_mr_spec.rb
index 8ad884492d1..9e007ab7635 100644
--- a/spec/features/merge_requests/edit_mr_spec.rb
+++ b/spec/features/merge_requests/edit_mr_spec.rb
@@ -17,16 +17,5 @@ feature 'Edit Merge Request', feature: true do
     it 'form should have class js-quick-submit' do
       expect(page).to have_selector('.js-quick-submit')
     end
-
-    it 'warns about version conflict' do
-      merge_request.update(title: "New title")
-
-      fill_in 'merge_request_title', with: 'bug 345'
-      fill_in 'merge_request_description', with: 'bug description'
-
-      click_button 'Save changes'
-
-      expect(page).to have_content 'Someone edited the merge request the same time you did'
-    end
   end
 end