Index: trunk/data/validator/wikipedia.mapcss
===================================================================
--- trunk/data/validator/wikipedia.mapcss	(revision 11756)
+++ trunk/data/validator/wikipedia.mapcss	(revision 11766)
@@ -119,5 +119,5 @@
 /* Detect invalid wikidata tags */
 *[wikidata][wikidata !~ /^Q[1-9][0-9]{0,8}$/] {
-  throwError: tr("wikidata tag must be in Qnnnn format, where n is a digit'");
+  throwError: tr("wikidata tag must be in Qnnnn format, where n is a digit");
   assertMatch: "node wikidata=a";
   assertMatch: "node wikidata=Q";