SPDX-FileCopyrightText: 2025 Samuel Tyler <samuel@samuelt.me>

SPDX-License-Identifier: Artistic-1.0

Older versions of Bison produced 4 spaces before `goto yyerrlab`,
but ours produces more.

--- perl-5.8.9/x2p/Makefile.SH	2025-07-17 18:07:55.350717970 +1000
+++ perl-5.8.9/x2p/Makefile.SH	2025-07-17 18:09:02.340711269 +1000
@@ -123,7 +123,7 @@
 	sed -e 's/(yyn = yydefred\[yystate\])/((yyn = yydefred[yystate]))/' \
 	    -e 's/(yys = getenv("YYDEBUG"))/((yys = getenv("YYDEBUG")))/' \
 	    -e 's/^yyerrlab://' \
-	    -e 's/^    goto yyerrlab;//' \
+	    -e 's/^ *goto yyerrlab;//' \
 	    -e 's/^yynewerror://' \
 	    -e 's/^    goto yynewerror;//' \
 	    -e 's|^static char yysccsid\(.*\)|/* static char yysccsid\1 */|' \