Index: applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/utils/ValidationUtil.java
===================================================================
--- applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/utils/ValidationUtil.java	(revision 32064)
+++ applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/utils/ValidationUtil.java	(revision 32065)
@@ -43,5 +43,5 @@
   public static void throwExceptionForInvalidImgKey(String imgKey, boolean nullAllowed) {
     if (!validateSequenceKey(imgKey)) {
-      throw new IllegalArgumentException(I18n.tr("The image key ''{{0}}'' is invalid!", imgKey));
+      throw new IllegalArgumentException(I18n.tr("The image key ''{0}'' is invalid!", imgKey));
     }
     if (!nullAllowed && imgKey == null) {
@@ -59,5 +59,5 @@
   public static void throwExceptionForInvalidSeqKey(String seqKey, boolean nullAllowed) {
     if (!validateSequenceKey(seqKey)) {
-      throw new IllegalArgumentException(I18n.tr("The sequence key ''{{0}}'' is invalid!", seqKey));
+      throw new IllegalArgumentException(I18n.tr("The sequence key ''{0}'' is invalid!", seqKey));
     }
     if (!nullAllowed && seqKey == null) {