Remove trailing space

Author: nicolas-grekas

Catalogue/TargetOperation.php

@@ -17,7 +17,7 @@
  * all = intersection ∪ (target ∖ intersection) = target
  * new = all ∖ source = {x: x ∈ target ∧ x ∉ source}
  * obsolete = source ∖ all = source ∖ target = {x: x ∈ source ∧ x ∉ target}
- * Basically, the result contains messages from the target catalogue. 
+ * Basically, the result contains messages from the target catalogue.
  *
  * @author Michael Lee <michael.lee@zerustech.com>
  */
@@ -34,12 +34,12 @@ protected function processDomain($domain)
             'obsolete' => array(),
         );
 
-        // For 'all' messages, the code can't be simplified as ``$this->messages[$domain]['all'] = $target->all($domain);``, 
+        // For 'all' messages, the code can't be simplified as ``$this->messages[$domain]['all'] = $target->all($domain);``,
         // because doing so will drop messages like {x: x ∈ source ∧ x ∉ target.all ∧ x ∈ target.fallback}
         //
         // For 'new' messages, the code can't be simplied as ``array_diff_assoc($this->target->all($domain), $this->source->all($domain));``
         // because doing so will not exclude messages like {x: x ∈ target ∧ x ∉ source.all ∧ x ∈ source.fallback}
-        // 
+        //
         // For 'obsolete' messages, the code can't be simplifed as ``array_diff_assoc($this->source->all($domain), $this->target->all($domain))``
         // because doing so will not exclude messages like {x: x ∈ source ∧ x ∉ target.all ∧ x ∈ target.fallback}