#1960 - Add unit test to look for extra spaces at end of line

- Added no_extra_spaces_at_end_of_line_test to File_Structure_Test.
- Updated Gallery_Filters to exclude testing code that isn't ours.
- Removed existing extra spaces.  New test now passes.

modules/gallery/tests/File_Structure_Test.php

@@ -285,7 +285,7 @@ class File_Structure_Test extends Gallery_Unit_Test_Case {
   }
 
   public function all_public_functions_in_test_files_end_in_test() {
-    // Who tests the tests?  :-)
+    // Who tests the tests?  :-)   (ref: http://www.xkcd.com/1163)
     $dir = new PhpCodeFilterIterator(
       new GalleryCodeFilterIterator(
         new RecursiveIteratorIterator(
@@ -315,4 +315,20 @@ class File_Structure_Test extends Gallery_Unit_Test_Case {
       }
     }
   }
+
+  public function no_extra_spaces_at_end_of_line_test() {
+    $dir = new GalleryCodeFilterIterator(
+      new RecursiveIteratorIterator(new RecursiveDirectoryIterator(DOCROOT)));
+    $errors = "";
+    foreach ($dir as $file) {
+      if (preg_match("/\.(php|css|html|js)$/", $file)) {
+        foreach (file($file) as $line_num => $line) {
+          if ((substr($line, -2) == " \n") || (substr($line, -1) == " ")) {
+            $errors .= "$file at line " . ($line_num + 1) . "\n";
+          }
+        }
+      }
+    }
+    $this->assert_true(empty($errors), "Extra spaces at end of line found at:\n$errors");
+  }
 }