- fail <<END
-Branch $dstbranch already exists
-Specify ..$specbranch for a pseudo-merge, binding in existing history
-Specify +$specbranch to overwrite, discarding existing history
+ fail f_ <<END, $dstbranch, $specbranch, $specbranch
+Branch %s already exists
+Specify ..%s for a pseudo-merge, binding in existing history
+Specify +%s to overwrite, discarding existing history