removed lots of trailing whitespace

30 files changed, 131 insertions, 131 deletions

diff --git a/core/DataTable/BaseFilter.php b/core/DataTable/BaseFilter.php
index 7e8f1c4dd4..fb2dc009f9 100644
--- a/core/DataTable/BaseFilter.php
+++ b/core/DataTable/BaseFilter.php
@@ -13,7 +13,7 @@ use Piwik\DataTable\Row;
 
 /**
  * A filter is set of logic that manipulates a DataTable. Existing filters do things like,
- * 
+ *
  * - remove rows
  * - change column values (change string to lowercase, truncate, etc.)
  * - add/remove columns or metadata (compute percentage values, add an 'icon' metadata based on the label, etc.)
@@ -22,10 +22,10 @@ use Piwik\DataTable\Row;
  *
  * Filters are called with a DataTable instance and extra parameters that are specified
  * in {@link Piwik\DataTable::filter()} and {@link Piwik\DataTable::queueFilter()}.
- * 
+ *
  * To see examples of Filters look at the existing ones in the Piwik\DataTable\BaseFilter
  * namespace.
- * 
+ *
  * @api
  */
 abstract class BaseFilter
@@ -37,7 +37,7 @@ abstract class BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table
      */
     public function __construct(DataTable $table)
diff --git a/core/DataTable/Filter/AddColumnsProcessedMetrics.php b/core/DataTable/Filter/AddColumnsProcessedMetrics.php
index 8ad329e610..f3d8191b1f 100644
--- a/core/DataTable/Filter/AddColumnsProcessedMetrics.php
+++ b/core/DataTable/Filter/AddColumnsProcessedMetrics.php
@@ -17,22 +17,22 @@ use Piwik\Metrics;
  * Adds processed metrics columns to a {@link DataTable} using metrics that already exist.
  *
  * Columns added are:
- * 
+ *
  * - **conversion_rate**: percent value of `nb_visits_converted / nb_visits
  * - **nb_actions_per_visit**: `nb_actions / nb_visits`
  * - **avg_time_on_site**: in number of seconds, `round(visit_length / nb_visits)`. Not
  *                         pretty formatted.
  * - **bounce_rate**: percent value of `bounce_count / nb_visits`
- * 
+ *
  * Adding the **filter_add_columns_when_show_all_columns** query parameter to
  * an API request will trigger the execution of this Filter.
- * 
+ *
  * _Note: This filter must be called before {@link ReplaceColumnNames} is called._
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->filter('AddColumnsProcessedMetrics');
- * 
+ *
  * @api
  */
 class AddColumnsProcessedMetrics extends BaseFilter
@@ -43,7 +43,7 @@ class AddColumnsProcessedMetrics extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table to eventually filter.
      * @param bool $deleteRowsWithNoVisit Whether to delete rows with no visits or not.
      */
diff --git a/core/DataTable/Filter/AddColumnsProcessedMetricsGoal.php b/core/DataTable/Filter/AddColumnsProcessedMetricsGoal.php
index 7f828a1f62..742f1aef6d 100644
--- a/core/DataTable/Filter/AddColumnsProcessedMetricsGoal.php
+++ b/core/DataTable/Filter/AddColumnsProcessedMetricsGoal.php
@@ -38,17 +38,17 @@ use Piwik\Tracker\GoalManager;
  *                                        reports.
  * - **goal_%idGoal%_items**: number of items. Only for ecommerce order and abandoned cart
  *                            reports.
- * 
+ *
  * Adding the **filter_update_columns_when_show_all_goals** query parameter to
  * an API request will trigger the execution of this Filter.
- * 
+ *
  * _Note: This filter must be called before {@link ReplaceColumnNames} is called._
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->filter('AddColumnsProcessedMetricsGoal',
  *         array($enable = true, $idGoal = Piwik::LABEL_ID_GOAL_IS_ECOMMERCE_ORDER));
- * 
+ *
  * @api
  */
 class AddColumnsProcessedMetricsGoal extends AddColumnsProcessedMetrics
@@ -72,7 +72,7 @@ class AddColumnsProcessedMetricsGoal extends AddColumnsProcessedMetrics
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table that will eventually filtered.
      * @param bool $enable Always set to true.
      * @param string $processOnlyIdGoal Defines what metrics to add (don't process metrics when you don't display them).
diff --git a/core/DataTable/Filter/AddSummaryRow.php b/core/DataTable/Filter/AddSummaryRow.php
index 09f6725db0..9cb4b3e2f1 100644
--- a/core/DataTable/Filter/AddSummaryRow.php
+++ b/core/DataTable/Filter/AddSummaryRow.php
@@ -16,12 +16,12 @@ use Piwik\DataTable\Row\DataTableSummaryRow;
  * Adds a summary row to {@link DataTable}s that contains the sum of all other table rows.
  *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->filter('AddSummaryRow');
- * 
+ *
  *     // use a human readable label for the summary row (instead of '-1')
  *     $dataTable->filter('AddSummaryRow', array($labelSummaryRow = Piwik::translate('General_Total')));
- * 
+ *
  * @api
  */
 class AddSummaryRow extends BaseFilter
diff --git a/core/DataTable/Filter/BeautifyRangeLabels.php b/core/DataTable/Filter/BeautifyRangeLabels.php
index 7f60bdd714..534f484bff 100644
--- a/core/DataTable/Filter/BeautifyRangeLabels.php
+++ b/core/DataTable/Filter/BeautifyRangeLabels.php
@@ -28,11 +28,11 @@ use Piwik\Piwik;
  * This filter can be extended to vary exactly how ranges are prettified based
  * on the range values found in the DataTable. To see an example of this,
  * take a look at the {@link BeautifyTimeRangeLabels} filter.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->queueFilter('BeautifyRangeLabels', array("1 visit", "%s visits"));
- * 
+ *
  * @api
  */
 class BeautifyRangeLabels extends ColumnCallbackReplace
diff --git a/core/DataTable/Filter/BeautifyTimeRangeLabels.php b/core/DataTable/Filter/BeautifyTimeRangeLabels.php
index 1841d94f48..aed7af7d8d 100644
--- a/core/DataTable/Filter/BeautifyTimeRangeLabels.php
+++ b/core/DataTable/Filter/BeautifyTimeRangeLabels.php
@@ -17,11 +17,11 @@ use Piwik\DataTable;
  * This filter customizes the behavior of the {@link BeautifyRangeLabels} filter
  * so range values that are less than one minute are displayed in seconds but
  * other ranges are displayed in minutes.
- * 
+ *
  * **Basic usage**
- * 
+ *
  *     $dataTable->filter('BeautifyTimeRangeLabels', array("%1$s-%2$s min", "1 min", "%s min"));
- * 
+ *
  * @api
  */
 class BeautifyTimeRangeLabels extends BeautifyRangeLabels
diff --git a/core/DataTable/Filter/CalculateEvolutionFilter.php b/core/DataTable/Filter/CalculateEvolutionFilter.php
index 28022952e0..80f789919e 100755
--- a/core/DataTable/Filter/CalculateEvolutionFilter.php
+++ b/core/DataTable/Filter/CalculateEvolutionFilter.php
@@ -17,12 +17,12 @@ use Piwik\Site;
  * it to each row as a percentage.
  *
  * **This filter cannot be used as an argument to {@link Piwik\DataTable::filter()}** since
- * it requires corresponding data from another DataTable. Instead, 
+ * it requires corresponding data from another DataTable. Instead,
  * you must manually perform a binary filter (see the **MultiSites** API for an
  * example).
  *
  * The evolution metric is calculated as:
- * 
+ *
  *     ((currentValue - pastValue) / pastValue) * 100
  *
  * @api
diff --git a/core/DataTable/Filter/ColumnCallbackAddColumn.php b/core/DataTable/Filter/ColumnCallbackAddColumn.php
index 0084fd076b..27746c4f28 100755
--- a/core/DataTable/Filter/ColumnCallbackAddColumn.php
+++ b/core/DataTable/Filter/ColumnCallbackAddColumn.php
@@ -13,13 +13,13 @@ use Piwik\DataTable\BaseFilter;
 
 /**
  * Adds a new column to every row of a {@link DataTable} based on the result of callback.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $callback = function ($visits, $timeSpent) {
  *         return round($timeSpent / $visits, 2);
  *     };
- *     
+ *
  *     $dataTable->filter('ColumnCallbackAddColumn', array(array('nb_visits', 'sum_time_spent'), 'avg_time_on_site', $callback));
  *
  * @api
@@ -93,7 +93,7 @@ class ColumnCallbackAddColumn extends BaseFilter
                 }
 
                 $parameters = array_merge($columnValues, $functionParams);
-                
+
                 return call_user_func_array($functionToApply, $parameters);
             });
 
diff --git a/core/DataTable/Filter/ColumnCallbackAddColumnPercentage.php b/core/DataTable/Filter/ColumnCallbackAddColumnPercentage.php
index de1e5e950a..056c129440 100644
--- a/core/DataTable/Filter/ColumnCallbackAddColumnPercentage.php
+++ b/core/DataTable/Filter/ColumnCallbackAddColumnPercentage.php
@@ -13,11 +13,11 @@ use Piwik\Piwik;
 /**
  * Calculates a percentage value for each row of a {@link DataTable} and adds the result
  * to each row.
- * 
+ *
  * See {@link ColumnCallbackAddColumnQuotient} for more information.
  *
  * **Basic usage example**
- * 
+ *
  *     $nbVisits = // ... get the visits for a period ...
  *     $dataTable->queueFilter('ColumnCallbackAddColumnPercentage', array('nb_visits', 'nb_visits_percentage', $nbVisits, 1));
  *
diff --git a/core/DataTable/Filter/ColumnCallbackAddColumnQuotient.php b/core/DataTable/Filter/ColumnCallbackAddColumnQuotient.php
index d82599be5c..5cc83d8e3d 100644
--- a/core/DataTable/Filter/ColumnCallbackAddColumnQuotient.php
+++ b/core/DataTable/Filter/ColumnCallbackAddColumnQuotient.php
@@ -15,14 +15,14 @@ use Piwik\DataTable\Row;
 /**
  * Calculates the quotient of two columns and adds the result as a new column
  * for each row of a DataTable.
- * 
+ *
  * This filter is used to calculate rate values (eg, `'bounce_rate'`), averages
  * (eg, `'avg_time_on_page'`) and other types of values.
  *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->queueFilter('ColumnCallbackAddColumnQuotient', array('bounce_rate', 'bounce_count', 'nb_visits', $precision = 2));
- * 
+ *
  * @api
  */
 class ColumnCallbackAddColumnQuotient extends BaseFilter
@@ -38,7 +38,7 @@ class ColumnCallbackAddColumnQuotient extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable that will eventually be filtered.
      * @param string $columnNameToAdd The name of the column to add the quotient value to.
      * @param string $columnValueToRead The name of the column that holds the dividend.
diff --git a/core/DataTable/Filter/ColumnCallbackAddMetadata.php b/core/DataTable/Filter/ColumnCallbackAddMetadata.php
index 1a2b9b27f7..e89000f8fd 100644
--- a/core/DataTable/Filter/ColumnCallbackAddMetadata.php
+++ b/core/DataTable/Filter/ColumnCallbackAddMetadata.php
@@ -14,11 +14,11 @@ use Piwik\DataTable\BaseFilter;
 /**
  * Executes a callback for each row of a {@link DataTable} and adds the result as a new
  * row metadata value.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->filter('ColumnCallbackAddMetadata', array('label', 'logo', 'Piwik\Plugins\MyPlugin\getLogoFromLabel'));
- * 
+ *
  * @api
  */
 class ColumnCallbackAddMetadata extends BaseFilter
@@ -31,7 +31,7 @@ class ColumnCallbackAddMetadata extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable instance that will be filtered.
      * @param string|array $columnsToRead The columns to read from each row and pass on to the callback.
      * @param string $metadataToAdd The name of the metadata field that will be added to each row.
diff --git a/core/DataTable/Filter/ColumnCallbackDeleteRow.php b/core/DataTable/Filter/ColumnCallbackDeleteRow.php
index f5883d1b6a..189fbd3b81 100644
--- a/core/DataTable/Filter/ColumnCallbackDeleteRow.php
+++ b/core/DataTable/Filter/ColumnCallbackDeleteRow.php
@@ -15,12 +15,12 @@ use Piwik\DataTable\BaseFilter;
  * Deletes all rows for which a callback returns true.
  *
  * **Basic usage example**
- * 
+ *
  *     $labelsToRemove = array('label1', 'label2', 'label2');
  *     $dataTable->filter('ColumnCallbackDeleteRow', array('label', function ($label) use ($labelsToRemove) {
  *         return in_array($label, $labelsToRemove);
  *     }));
- * 
+ *
  * @api
  */
 class ColumnCallbackDeleteRow extends BaseFilter
@@ -31,7 +31,7 @@ class ColumnCallbackDeleteRow extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable that will be filtered eventually.
      * @param array|string $columnsToFilter The column or array of columns that should be
      *                                      passed to the callback.
diff --git a/core/DataTable/Filter/ColumnCallbackReplace.php b/core/DataTable/Filter/ColumnCallbackReplace.php
index bec7d683f5..e33dfa9a14 100644
--- a/core/DataTable/Filter/ColumnCallbackReplace.php
+++ b/core/DataTable/Filter/ColumnCallbackReplace.php
@@ -15,9 +15,9 @@ use Piwik\DataTable\Row;
 /**
  * Replaces one or more column values in each row of a DataTable with the results
  * of a callback.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $truncateString = function ($value, $truncateLength) {
  *         if (strlen($value) > $truncateLength) {
  *             return substr(0, $truncateLength);
@@ -25,10 +25,10 @@ use Piwik\DataTable\Row;
  *             return $value;
  *         }
  *     };
- *     
+ *
  *     // label, url and truncate_length are columns in $dataTable
  *     $dataTable->filter('ColumnCallbackReplace', array('label', 'url'), $truncateString, null, array('truncate_length'));
- * 
+ *
  */
 class ColumnCallbackReplace extends BaseFilter
 {
@@ -39,7 +39,7 @@ class ColumnCallbackReplace extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable to filter.
      * @param array|string $columnsToFilter The columns whose values should be passed to the callback
      *                                      and then replaced with the callback's result.
diff --git a/core/DataTable/Filter/ColumnDelete.php b/core/DataTable/Filter/ColumnDelete.php
index 7631c7a9c2..976519c6fa 100644
--- a/core/DataTable/Filter/ColumnDelete.php
+++ b/core/DataTable/Filter/ColumnDelete.php
@@ -16,15 +16,15 @@ use Piwik\DataTable\BaseFilter;
  * whitelist or both.
  *
  * This filter is used to handle the **hideColumn** and **showColumn** query parameters.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $columnsToRemove = array('nb_hits', 'nb_pageviews');
  *     $dataTable->filter('ColumnDelete', array($columnsToRemove));
- * 
+ *
  *     $columnsToKeep = array('nb_visits');
  *     $dataTable->filter('ColumnDelete', array(array(), $columnsToKeep));
- * 
+ *
  * @api
  */
 class ColumnDelete extends BaseFilter
diff --git a/core/DataTable/Filter/ExcludeLowPopulation.php b/core/DataTable/Filter/ExcludeLowPopulation.php
index e346ea28fc..ee135b59d6 100644
--- a/core/DataTable/Filter/ExcludeLowPopulation.php
+++ b/core/DataTable/Filter/ExcludeLowPopulation.php
@@ -14,17 +14,17 @@ use Piwik\DataTable\BaseFilter;
 /**
  * Deletes all rows for which a specific column has a value that is lower than
  * specified minimum threshold value.
- * 
+ *
  * **Basic usage examples**
- * 
+ *
  *     // remove all countries from UserCountry.getCountry that have less than 3 visits
  *     $dataTable = // ... get a DataTable whose queued filters have been run ...
  *     $dataTable->filter('ExcludeLowPopulation', array('nb_visits', 3));
- * 
+ *
  *     // remove all countries from UserCountry.getCountry whose percent of total visits is less than 5%
  *     $dataTable = // ... get a DataTable whose queued filters have been run ...
  *     $dataTable->filter('ExcludeLowPopulation', array('nb_visits', false, 0.05));
- * 
+ *
  *     // remove all countries from UserCountry.getCountry whose bounce rate is less than 10%
  *     $dataTable = // ... get a DataTable that has a numerical bounce_rate column ...
  *     $dataTable->filter('ExcludeLowPopulation', array('bounce_rate', 0.10));
@@ -50,7 +50,7 @@ class ExcludeLowPopulation extends BaseFilter
      * @param string $columnToFilter The name of the column whose value will determine whether
      *                               a row is deleted or not.
      * @param number|false $minimumValue The minimum column value. Rows with column values <
-     *                                   this number will be deleted. If false, 
+     *                                   this number will be deleted. If false,
      *                                   `$minimumPercentageThreshold` is used.
      * @param bool|float $minimumPercentageThreshold If supplied, column values must be a greater
      *                                               percentage of the sum of all column values than
diff --git a/core/DataTable/Filter/GroupBy.php b/core/DataTable/Filter/GroupBy.php
index d783db8bca..8633fb2e9d 100755
--- a/core/DataTable/Filter/GroupBy.php
+++ b/core/DataTable/Filter/GroupBy.php
@@ -18,12 +18,12 @@ use Piwik\DataTable\BaseFilter;
  * _NOTE: This filter should never be queued, it must be applied directly on a {@link DataTable}._
  *
  * **Basic usage example**
- * 
+ *
  *     // group URLs by host
  *     $dataTable->filter('GroupBy', array('label', function ($labelUrl) {
  *         return parse_url($labelUrl, PHP_URL_HOST);
  *     }));
- * 
+ *
  * @api
  */
 class GroupBy extends BaseFilter
diff --git a/core/DataTable/Filter/Limit.php b/core/DataTable/Filter/Limit.php
index c06bac49c5..5cf848a50e 100644
--- a/core/DataTable/Filter/Limit.php
+++ b/core/DataTable/Filter/Limit.php
@@ -13,9 +13,9 @@ use Piwik\DataTable\BaseFilter;
 
 /**
  * Delete all rows from the table that are not in the given [offset, offset+limit) range.
- * 
+ *
  * **Basic example usage**
- * 
+ *
  *     // delete all rows from 5 -> 15
  *     $dataTable->filter('Limit', array(5, 10));
  *
diff --git a/core/DataTable/Filter/MetadataCallbackAddMetadata.php b/core/DataTable/Filter/MetadataCallbackAddMetadata.php
index 0f7af76a29..7f6aaef123 100644
--- a/core/DataTable/Filter/MetadataCallbackAddMetadata.php
+++ b/core/DataTable/Filter/MetadataCallbackAddMetadata.php
@@ -16,7 +16,7 @@ use Piwik\DataTable\BaseFilter;
  * row as a metadata value. Only metadata values are passed to the callback.
  *
  * **Basic usage example**
- * 
+ *
  *     // add a logo metadata based on the url metadata
  *     $dataTable->filter('MetadataCallbackAddMetadata', array('url', 'logo', 'Piwik\Plugins\MyPlugin\getLogoFromUrl'));
  *
@@ -31,7 +31,7 @@ class MetadataCallbackAddMetadata extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable that will eventually be filtered.
      * @param string|array $metadataToRead The metadata to read from each row and pass to the callback.
      * @param string $metadataToAdd The name of the metadata to add.
@@ -57,7 +57,7 @@ class MetadataCallbackAddMetadata extends BaseFilter
 
     /**
      * See {@link MetadataCallbackAddMetadata}.
-     * 
+     *
      * @param DataTable $table
      */
     public function filter($table)
diff --git a/core/DataTable/Filter/MetadataCallbackReplace.php b/core/DataTable/Filter/MetadataCallbackReplace.php
index 50e773c98e..cb04cdb164 100644
--- a/core/DataTable/Filter/MetadataCallbackReplace.php
+++ b/core/DataTable/Filter/MetadataCallbackReplace.php
@@ -14,9 +14,9 @@ use Piwik\DataTable\Row;
 /**
  * Execute a callback for each row of a {@link DataTable} passing certain column values and metadata
  * as metadata, and replaces row metadata with the callback result.
- * 
+ *
  * **Basic usage example**
- * 
+ *
  *     $dataTable->filter('MetadataCallbackReplace', array('url', function ($url) {
  *         return $url . '#index';
  *     }));
@@ -27,7 +27,7 @@ class MetadataCallbackReplace extends ColumnCallbackReplace
 {
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The DataTable that will eventually be filtered.
      * @param array|string $metadataToFilter The metadata whose values should be passed to the callback
      *                                       and then replaced with the callback's result.
diff --git a/core/DataTable/Filter/Pattern.php b/core/DataTable/Filter/Pattern.php
index 94893e6d9e..832fb856a2 100644
--- a/core/DataTable/Filter/Pattern.php
+++ b/core/DataTable/Filter/Pattern.php
@@ -13,9 +13,9 @@ use Piwik\DataTable\BaseFilter;
 
 /**
  * Deletes every row for which a specific column does not match a supplied regex pattern.
- * 
+ *
  * **Example**
- * 
+ *
  *     // filter out all rows whose labels doesn't start with piwik
  *     $dataTable->filter('Pattern', array('label', '^piwik'));
  *
@@ -30,7 +30,7 @@ class Pattern extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table to eventually filter.
      * @param string $columnToFilter The column to match with the `$patternToSearch` pattern.
      * @param string $patternToSearch The regex pattern to use.
@@ -74,7 +74,7 @@ class Pattern extends BaseFilter
 
     /**
      * See {@link Pattern}.
-     * 
+     *
      * @param DataTable $table
      */
     public function filter($table)
diff --git a/core/DataTable/Filter/PatternRecursive.php b/core/DataTable/Filter/PatternRecursive.php
index 10bf918f68..697403c2e3 100644
--- a/core/DataTable/Filter/PatternRecursive.php
+++ b/core/DataTable/Filter/PatternRecursive.php
@@ -16,9 +16,9 @@ use Piwik\DataTable\Manager;
 /**
  * Deletes rows that do not contain a column that matches a regex pattern and do not contain a
  * subtable that contains a column that matches a regex pattern.
- * 
+ *
  * **Example**
- * 
+ *
  *     // only display index pageviews in Actions.getPageUrls
  *     $dataTable->filter('PatternRecursive', array('label', 'index'));
  *
@@ -32,7 +32,7 @@ class PatternRecursive extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table to eventually filter.
      * @param string $columnToFilter The column to match with the `$patternToSearch` pattern.
      * @param string $patternToSearch The regex pattern to use.
@@ -48,7 +48,7 @@ class PatternRecursive extends BaseFilter
 
     /**
      * See {@link PatternRecursive}.
-     * 
+     *
      * @param DataTable $table
      * @return int The number of deleted rows.
      */
diff --git a/core/DataTable/Filter/ReplaceColumnNames.php b/core/DataTable/Filter/ReplaceColumnNames.php
index 4dd3218902..27875db41a 100644
--- a/core/DataTable/Filter/ReplaceColumnNames.php
+++ b/core/DataTable/Filter/ReplaceColumnNames.php
@@ -18,15 +18,15 @@ use Piwik\Tracker\GoalManager;
 /**
  * Replaces column names in each row of a table using an array that maps old column
  * names new ones.
- * 
+ *
  * If no mapping is provided, this column will use one that maps index metric names
  * (which are integers) with their string column names. In the database, reports are
  * stored with integer metric names because it results in blobs that take up less space.
  * When loading the reports, the column names must be replaced, which is handled by this
  * class. (See {@link Piwik\Metrics} for more information about integer metric names.)
- * 
+ *
  * **Basic example**
- * 
+ *
  *     // filter use in a plugin's API method
  *     public function getMyReport($idSite, $period, $date, $segment = false, $expanded = false)
  *     {
@@ -34,7 +34,7 @@ use Piwik\Tracker\GoalManager;
  *         $dataTable->queueFilter('ReplaceColumnNames');
  *         return $dataTable;
  *     }
- * 
+ *
  * @api
  */
 class ReplaceColumnNames extends BaseFilter
@@ -43,14 +43,14 @@ class ReplaceColumnNames extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table that will be eventually filtered.
      * @param array|null $mappingToApply The name mapping to apply. Must map old column names
      *                                   with new ones, eg,
-     *                                   
+     *
      *                                       array('OLD_COLUMN_NAME' => 'NEW_COLUMN NAME',
      *                                             'OLD_COLUMN_NAME2' => 'NEW_COLUMN NAME2')
-     *                                   
+     *
      *                                   If null, {@link Piwik\Metrics::$mappingFromIdToName} is used.
      */
     public function __construct($table, $mappingToApply = null)
diff --git a/core/DataTable/Filter/ReplaceSummaryRowLabel.php b/core/DataTable/Filter/ReplaceSummaryRowLabel.php
index 23a5926691..3c1e31e2d0 100644
--- a/core/DataTable/Filter/ReplaceSummaryRowLabel.php
+++ b/core/DataTable/Filter/ReplaceSummaryRowLabel.php
@@ -15,24 +15,24 @@ use Piwik\Piwik;
 
 /**
  * Replaces the label of the summary row with a supplied label.
- * 
+ *
  * This filter is only used to prettify the summary row label and so it should
  * always be queued on a {@link DataTable}.
- * 
+ *
  * This filter always recurses. In other words, this filter will always apply itself to
  * all subtables in the given {@link DataTable}'s table hierarchy.
- * 
+ *
  * **Basic example**
- * 
+ *
  *     $dataTable->queueFilter('ReplaceSummaryRowLabel', array(Piwik::translate('General_Others')));
- * 
+ *
  * @api
  */
 class ReplaceSummaryRowLabel extends BaseFilter
 {
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table that will eventually be filtered.
      * @param string|null $newLabel The new label for summary row. If null, defaults to
      *                              `Piwik::translate('General_Others')`.
diff --git a/core/DataTable/Filter/SafeDecodeLabel.php b/core/DataTable/Filter/SafeDecodeLabel.php
index 8922482398..f2629618b1 100644
--- a/core/DataTable/Filter/SafeDecodeLabel.php
+++ b/core/DataTable/Filter/SafeDecodeLabel.php
@@ -13,7 +13,7 @@ use Piwik\DataTable\BaseFilter;
 
 /**
  * Sanitizes DataTable labels as an extra precaution. Called internally by Piwik.
- * 
+ *
  */
 class SafeDecodeLabel extends BaseFilter
 {
diff --git a/core/DataTable/Filter/Sort.php b/core/DataTable/Filter/Sort.php
index e11749a0e4..6ba2cd1ff0 100644
--- a/core/DataTable/Filter/Sort.php
+++ b/core/DataTable/Filter/Sort.php
@@ -16,7 +16,7 @@ use Piwik\Metrics;
 
 /**
  * Sorts a {@link DataTable} based on the value of a specific column.
- * 
+ *
  * It is possible to specify a natural sorting (see [php.net/natsort](http://php.net/natsort) for details).
  *
  * @api
@@ -28,7 +28,7 @@ class Sort extends BaseFilter
 
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table to eventually filter.
      * @param string $columnToSort The name of the column to sort by.
      * @param string $order order `'asc'` or `'desc'`.
diff --git a/core/DataTable/Filter/Truncate.php b/core/DataTable/Filter/Truncate.php
index 13d2a619c0..192d85b82f 100644
--- a/core/DataTable/Filter/Truncate.php
+++ b/core/DataTable/Filter/Truncate.php
@@ -16,26 +16,26 @@ use Piwik\Piwik;
 /**
  * Truncates a {@link DataTable} by merging all rows after a certain index into a new summary
  * row. If the count of rows is less than the index, nothing happens.
- * 
+ *
  * The {@link ReplaceSummaryRowLabel} filter will be queued after the table is truncated.
- * 
+ *
  * ### Examples
- * 
+ *
  * **Basic usage**
- * 
+ *
  *     $dataTable->filter('Truncate', array($truncateAfter = 500));
- * 
+ *
  * **Using a custom summary row label**
- * 
+ *
  *     $dataTable->filter('Truncate', array($truncateAfter = 500, $summaryRowLabel = Piwik::translate('General_Total')));
- * 
+ *
  * @api
  */
 class Truncate extends BaseFilter
 {
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable $table The table that will be filtered eventually.
      * @param int $truncateAfter The row index to truncate at. All rows passed this index will
      *                           be removed.
diff --git a/core/DataTable/Map.php b/core/DataTable/Map.php
index 028c40b480..dd8bec7ca5 100644
--- a/core/DataTable/Map.php
+++ b/core/DataTable/Map.php
@@ -15,10 +15,10 @@ use Piwik\DataTable\Renderer\Console;
 /**
  * Stores an array of {@link DataTable}s indexed by one type of {@link DataTable} metadata (such as site ID
  * or period).
- * 
+ *
  * DataTable Maps are returned on all queries that involve multiple sites and/or multiple
  * periods. The Maps will contain a {@link DataTable} for each site and period combination.
- * 
+ *
  * The Map implements some {@link DataTable} such as {@link queueFilter()} and {@link getRowsCount}.
  *
  *
@@ -73,7 +73,7 @@ class Map implements DataTableInterface
 
     /**
      * Queue a filter to {@link DataTable} child of contained by this instance.
-     * 
+     *
      * See {@link Piwik\DataTable::queueFilter()} for more information..
      *
      * @param string|Closure $className Filter name, eg. `'Limit'` or a Closure.
@@ -142,7 +142,7 @@ class Map implements DataTableInterface
 
     /**
      * Returns the last element in the Map's array.
-     * 
+     *
      * @return DataTable|Map|false
      */
     public function getLastRow()
@@ -188,7 +188,7 @@ class Map implements DataTableInterface
      * Renames the given column in each contained {@link DataTable}.
      *
      * See {@link DataTable::renameColumn()}.
-     * 
+     *
      * @param string $oldName
      * @param string $newName
      */
@@ -203,7 +203,7 @@ class Map implements DataTableInterface
      * Deletes the specified columns in each contained {@link DataTable}.
      *
      * See {@link DataTable::deleteColumns()}.
-     * 
+     *
      * @param array $columns The columns to delete.
      * @param bool $deleteRecursiveInSubtables This param is currently not used.
      */
@@ -216,7 +216,7 @@ class Map implements DataTableInterface
 
     /**
      * Deletes a table from the array of DataTables.
-     * 
+     *
      * @param string $id The label associated with {@link DataTable}.
      */
     public function deleteRow($id)
@@ -263,19 +263,19 @@ class Map implements DataTableInterface
      * The result of this function is determined by the type of DataTable
      * this instance holds. If this DataTable\Map instance holds an array
      * of DataTables, this function will transform it from:
-     * 
+     *
      *     Label 0:
      *       DataTable(row1)
      *     Label 1:
      *       DataTable(row2)
-     * 
+     *
      * to:
-     * 
+     *
      *     DataTable(row1[label = 'Label 0'], row2[label = 'Label 1'])
      *
      * If this instance holds an array of DataTable\Maps, this function will
      * transform it from:
-     * 
+     *
      *     Outer Label 0:            // the outer DataTable\Map
      *       Inner Label 0:            // one of the inner DataTable\Maps
      *         DataTable(row1)
@@ -286,9 +286,9 @@ class Map implements DataTableInterface
      *         DataTable(row3)
      *       Inner Label 1:
      *         DataTable(row4)
-     * 
+     *
      * to:
-     * 
+     *
      *     Inner Label 0:
      *       DataTable(row1[label = 'Outer Label 0'], row3[label = 'Outer Label 1'])
      *     Inner Label 1:
@@ -366,11 +366,11 @@ class Map implements DataTableInterface
 
     /**
      * Sums a DataTable to all the tables in this array.
-     * 
+     *
      * _Note: Will only add `$tableToSum` if the childTable has some rows._
      *
      * See {@link Piwik\DataTable::addDataTable()}.
-     * 
+     *
      * @param DataTable $tableToSum
      */
     public function addDataTable(DataTable $tableToSum)
diff --git a/core/DataTable/Row.php b/core/DataTable/Row.php
index 18a7228359..3612cbe96a 100644
--- a/core/DataTable/Row.php
+++ b/core/DataTable/Row.php
@@ -14,7 +14,7 @@ use Piwik\Metrics;
 
 /**
  * This is what a {@link Piwik\DataTable} is composed of.
- * 
+ *
  * DataTable rows contain columns, metadata and a subtable ID. Columns and metadata
  * are stored as an array of name => value mappings.
  *
@@ -59,7 +59,7 @@ class Row
      * Constructor.
      *
      * @param array $row An array with the following structure:
-     *                   
+     *
      *                       array(
      *                           Row::COLUMNS => array('label' => 'Piwik',
      *                                                 'column1' => 42,
@@ -264,7 +264,7 @@ class Row
      * Returns the array containing all the columns.
      *
      * @return array  Example:
-     *                
+     *
      *                    array(
      *                        'column1'   => VALUE,
      *                        'label'     => 'www.php.net'
@@ -315,9 +315,9 @@ class Row
     /**
      * Sums a DataTable to this row's subtable. If this row has no subtable a new
      * one is created.
-     * 
+     *
      * See {@link Piwik\DataTable::addDataTable()} to learn how DataTables are summed.
-     * 
+     *
      * @param DataTable $subTable Table to sum to this row's subtable.
      */
     public function sumSubtable(DataTable $subTable)
@@ -495,7 +495,7 @@ class Row
      * Sums the given `$rowToSum` columns values to the existing row column values.
      * Only the int or float values will be summed. Label columns will be ignored
      * even if they have a numeric value.
-     * 
+     *
      * Columns in `$rowToSum` that don't exist in `$this` are added to `$this`.
      *
      * @param \Piwik\DataTable\Row $rowToSum The row to sum to this row.
@@ -573,7 +573,7 @@ class Row
 
     /**
      * Sums the metadata in `$rowToSum` with the metadata in `$this` row.
-     * 
+     *
      * @param Row $rowToSum
      */
     public function sumRowMetadata($rowToSum)
@@ -597,7 +597,7 @@ class Row
     /**
      * Returns `true` if this row is the summary row, `false` if otherwise. This function
      * depends on the label of the row, and so, is not 100% accurate.
-     * 
+     *
      * @return bool
      */
     public function isSummaryRow()
@@ -679,10 +679,10 @@ class Row
      * Helper function that tests if two rows are equal.
      *
      * Two rows are equal if:
-     * 
+     *
      * - they have exactly the same columns / metadata
      * - they have a subDataTable associated, then we check that both of them are the same.
-     * 
+     *
      * Column order is not important.
      *
      * @param \Piwik\DataTable\Row $row1 first to compare
diff --git a/core/DataTable/Row/DataTableSummaryRow.php b/core/DataTable/Row/DataTableSummaryRow.php
index 480631f2b8..7d477a304c 100644
--- a/core/DataTable/Row/DataTableSummaryRow.php
+++ b/core/DataTable/Row/DataTableSummaryRow.php
@@ -14,9 +14,9 @@ use Piwik\DataTable\Row;
 
 /**
  * A special row whose column values are the aggregate of the row's subtable.
- * 
+ *
  * This class creates sets its own columns to the sum of each row in the row's subtable.
- * 
+ *
  * Non-numeric columns are bypassed during summation and do not appear in this
  * rows columns.
  *
@@ -27,7 +27,7 @@ class DataTableSummaryRow extends Row
 {
     /**
      * Constructor.
-     * 
+     *
      * @param DataTable|null $subTable The subtable of this row. This parameter is mostly for
      *                                 convenience. If set, its rows will be summed to this one,
      *                                 but it will not be set as this row's subtable (so
diff --git a/core/DataTable/Simple.php b/core/DataTable/Simple.php
index f21aa62b9d..018818c203 100644
--- a/core/DataTable/Simple.php
+++ b/core/DataTable/Simple.php
@@ -12,7 +12,7 @@ use Piwik\DataTable;
 
 /**
  * A {@link Piwik\DataTable} where every row has two columns: **label** and **value**.
- * 
+ *
  * Simple DataTables are only used to slightly alter the output of some renderers
  * (notably the XML renderer).
  *
@@ -25,7 +25,7 @@ class Simple extends DataTable
      * values.
      *
      * @param array $array Array containing the rows, eg,
-     *                     
+     *
      *                         array(
      *                             'Label row 1' => $value1,
      *                             'Label row 2' => $value2,