Add ignore white space option in merge request diff

fix this issue(https://gitlab.com/gitlab-org/gitlab-ce/issues/1393).

Add ignore whitespace optoin to Commits Compare view

1 files changed, 2 insertions, 2 deletions

diff --git a/app/services/compare_service.rb b/app/services/compare_service.rb
index bfe6a3dc4be..ec581658fc1 100644
--- a/app/services/compare_service.rb
+++ b/app/services/compare_service.rb
@@ -3,7 +3,7 @@ require 'securerandom'
 # Compare 2 branches for one repo or between repositories
 # and return Gitlab::CompareResult object that responds to commits and diffs
 class CompareService
-  def execute(source_project, source_branch, target_project, target_branch)
+  def execute(source_project, source_branch, target_project, target_branch, diff_options = {})
     source_commit = source_project.commit(source_branch)
     return unless source_commit
 
@@ -25,7 +25,7 @@ class CompareService
         target_project.repository.raw_repository,
         target_branch,
         source_sha,
-      )
+      ), diff_options
     )
   end
 end