Index: trunk/src/org/openstreetmap/josm/io/imagery/WMSImagery.java
===================================================================
--- trunk/src/org/openstreetmap/josm/io/imagery/WMSImagery.java	(revision 13759)
+++ trunk/src/org/openstreetmap/josm/io/imagery/WMSImagery.java	(revision 13760)
@@ -316,5 +316,5 @@
 
         Utils.ensure(selectedStyles == null || selectedLayers.size() == selectedStyles.size(),
-                tr("Styles size {0} doesn't match layers size {1}"),
+                tr("Styles size {0} does not match layers size {1}"),
                 selectedStyles == null ? 0 : selectedStyles.size(),
                         selectedLayers.size());