bug 637953, trim with precision

migrations/156-strip-whitespace.sql

@@ -1,4 +1,5 @@
 UPDATE translations
     SET localized_string=TRIM(localized_string)
-    WHERE localized_string LIKE ' %' or localized_string LIKE '% ';
--- Query OK, 187318 rows affected (45.45 sec)
+    WHERE
+        localized_string LIKE ' %' AND
+        id IN (SELECT name FROM addons);