vim-patch:8.2.0829: filter() may give misleading error message

Problem:    filter() may give misleading error message.
Solution:   Also mention Blob as an allowed argument.
fcb0b61d15

Rename Test_map_fails() to Test_map_filter_fails() from v8.2.0610 and
include the modeline.

src/nvim/eval.c

@@ -6393,7 +6393,7 @@ void filter_map(typval_T *argvars, typval_T *rettv, int map)
       return;
     }
   } else {
-    EMSG2(_(e_listdictarg), ermsg);
+    EMSG2(_(e_listdictblobarg), ermsg);
     return;
   }