Jim Meyering 31b43733d4 tests: use "compare exp out", not "compare out exp"
Likewise, when an empty file is expected, use "compare /dev/null out",
not "compare out /dev/null". I.e., specify the expected/desired contents
via the first file name.  Prompted by a suggestion from Bruno Haible
in http://thread.gmane.org/gmane.comp.gnu.grep.bugs/4020/focus=29154

Run these commands:

  git grep -l -E 'compare [^ ]+ exp' \
    |xargs perl -pi -e 's/\b(compare) (\S+) (exp\S*)/$1 $3 $2/'
  git grep -l -E 'compare [^ ]+ /dev/null' \
    |xargs perl -pi -e 's,\b(compare) (\S+) (/dev/null),$1 $3 $2,'

But manually convert this one:

  -compare out exp-$(echo $opt|tr ' ' _)
  +compare exp-$(echo $opt|tr ' ' _) out

and avoid an inappropriate change to cfg.mk.
2011-11-29 17:17:10 +01:00

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#!/bin/sh
# Ensure that "-" means "standard input".
. "${srcdir=.}/init.sh"; path_prepend_ ../src
fail=0
cat <<EOF > exp || fail=1
--- -
+++ b
@@ -1 +1 @@
-a
+b
EOF
echo a > a
echo b > b
diff -u - b < a > out 2> err; test $? = 1 || fail=1
# Remove date and time.
sed -e 's/^\([-+*][-+*][-+*] [^ ]*\) .*/\1/' out > k; mv k out
compare exp out || fail=1
Exit $fail