Re: [TopGit PATCH] hooks/pre-commit.sh: fix it again

also sprach Bert Wesarg [off-list ref] [2009.03.25.1243 +0100]:

First I think the '#' is a leftover, second this is now a bashism.

I think this can be rewritten as POSIX as follows:

-			git rev-parse -q --verify "${head_/#refs\/heads/refs\/top-bases}" >/dev/null || exit 0;;
+			git rev-parse -q --verify "${head_/refs\/heads/refs\/top-bases}" >/dev/null || exit 0;;

  git rev-parse -q --verify "refs/top-bases/${head_##refs/heads/}" >/dev/null || exit 0;;

This turns e.g. refs/heads/foo into foo and prepends
refs/top-bases/, which should be the same effect, assuming that the
variable's value contains nothing else but the ref's path.

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