tests: remove quote magic from the bison test wrapper.

Basically, revert 4c4d35394d.

	* tests/bison.in: Leave bison's stderr as is.

tests/bison.in

@@ -20,25 +20,12 @@
 abs_top_srcdir='@abs_top_srcdir@'
 abs_top_builddir='@abs_top_builddir@'
 
-: ${PERL=perl}
-
 # Use the shipped files, not those installed.
 BISON_PKGDATADIR=$abs_top_srcdir/data
 export BISON_PKGDATADIR
 
-trap 'rm -f /tmp/bison.$$.*; exit $status' 0 1 2 13 15
-$PREBISON "$abs_top_builddir/src/bison" ${1+"$@"} 2>/tmp/bison.$$.err
+$PREBISON "$abs_top_builddir/src/bison" ${1+"$@"}
 status=$?
-# Protect from gettextized quotes.  See quotearg.c's gettext_quote for
-# the UTF-8 sequences.  For context, see
-# http://lists.gnu.org/archive/html/bug-bison/2012-01/msg00120.html
-#
-# In UTF-8 the quoting quote are not ', so bison use them to quote the
-# ' character.  When using ASCII quotes, bison issues "'".
-$PERL -p                                                                \
-  -e "s{\\xe2\\x80\\x98|\\xe2\\x80\\x99|\\xa1\\ae|\\xa1\\xaf}{'}g;"     \
-  -e "s{'''}{\"'\"}g;"                                                  \
-  /tmp/bison.$$.err >&2
 
 # As a special dark magic, if we are actually using this wrapper to
 # compile Bison's src/parse-gram.y, post-process the synclines to
@@ -47,6 +34,7 @@ for i
 do
   case $i in
     */src/parse-gram.y)
+    : ${PERL=perl}
     if $PERL --version >/dev/null; then
       # We are called by ylwrap which still uses y.tab.*, and
       # post-processes the synclines on y.tab.c itself.  Don't let it