MDL-45774 fix trailing whitespace

my/tests/behat/restrict_available_blocks.feature

@@ -26,7 +26,7 @@ Feature: Restrict which blocks can be added to Dashboard
     And the "Add a block" select box should contain "Tags"
 
   @javascript
-  Scenario: Remove the ability to add the comments block to Dashboard 
+  Scenario: Remove the ability to add the comments block to Dashboard
     When I log in as "admin"
     And I set the following system permissions of "Authenticated user" role:
       | block/comments:myaddinstance | Prohibit |

user/classes/output/myprofile/tree.php

@@ -121,7 +121,7 @@ class tree implements \renderable {
 
     /**
      * Find all category nodes that should be displayed after a given a category node.
-     * 
+     *
      * @param category $category category object
      *
      * @return category[] array of category objects