Index: generic/nsfError.c
===================================================================
diff -u -r87c6a11296ada89c007cc2ed33df6887ac53c740 -r00ff4a03e07cece02249590e1903a0644f3464bf
--- generic/nsfError.c	(.../nsfError.c)	(revision 87c6a11296ada89c007cc2ed33df6887ac53c740)
+++ generic/nsfError.c	(.../nsfError.c)	(revision 00ff4a03e07cece02249590e1903a0644f3464bf)
@@ -148,7 +148,7 @@
 
   Tcl_ResetResult(interp);
   if (context) {
-    Tcl_AppendResult(interp, context, ":",  (char *) NULL);
+    Tcl_AppendResult(interp, context, ": ",  (char *) NULL);
   }
   Tcl_AppendResult(interp,"expected ", type, " but got \"",  ObjStr(value), "\"", (char *) NULL);
   if (named) {