Remove double semicolons at end of line

This is the list of occurrences where we have ;; of end of lines:

./includes/common.inc:5201:    return $cache->data['#markup'];;
./modules/comment/comment.module:1589:  return $comment ? $comment[$cid] : FALSE;;
./modules/node/node.test:313:    $edit['title'] = $this->randomName(8);;
./modules/system/system.tar.inc:965:      $p_filename = $this->_translateWinPath($p_filename, false);;
./modules/system/system.tar.inc:1028:      $p_filename = $this->_translateWinPath($p_filename, false);;
./modules/trigger/trigger.test:48:      $loaded_node = $this->drupalGetNodeByTitle($edit["title"]);;

This is an easy patch, marking novice.