Index: trunk/src/org/openstreetmap/josm/io/OsmApi.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/OsmApi.java	(revision 1666)
+++ trunk/src/org/openstreetmap/josm/io/OsmApi.java	(revision 1667)
@@ -138,5 +138,5 @@
     protected OsmApi(String serverUrl)  {
         if (serverUrl == null)
-            throw new IllegalArgumentException(tr("parameter '{0} must not be null", "serverUrl"));
+            throw new IllegalArgumentException(tr("parameter '{0}' must not be null", "serverUrl"));
         this.serverUrl = serverUrl;
     }