fix typo in r66836, missing '/'s

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66901 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

configure.ac

@@ -3595,7 +3595,7 @@ AS_IF([test "${ARCH_FLAG}"], [
     CXXFLAGS=`echo "$CXXFLAGS" | sed "s| *$archflagpat"'||'`
     LDFLAGS=`echo "$LDFLAGS" | sed "s| *$archflagpat"'||'`
 ])
-rb_cv_warnflags=`echo "$rb_cv_warnflags" | sed 's/^ */;s/ *$/'`
+rb_cv_warnflags=`echo "$rb_cv_warnflags" | sed 's/^ *//;s/ *$//'`
 warnflags="$rb_cv_warnflags"
 AC_SUBST(cppflags)dnl
 AC_SUBST(cflags, ["${orig_cflags:+$orig_cflags }"'${optflags} ${debugflags} ${warnflags}'])dnl