A trivial script to scrub ChangeLog changes from "git show"

[David Malcolm]

I've been writing some automation around testing gcc patches, and kept
running into ChangeLog conflicts, so I wrote the following to make it
easier.

The attached one-liner wraps "git show" into a form that omits changes
to ChangeLog files, for use when generating patches from a git repo,
so that you can run things like:

# Get last commit, omitting ChangeLog changes:
./contrib/git-show-non-changelog.sh

# Get a specific commit, omitting ChangeLog changes:
./contrib/git-show-non-changelog.sh 60623f1616b3144310f432174ebbb3e2cc6dff28

# Get all my non-pushed changes, omitting ChangeLog changes:
./contrib/git-show-non-changelog.sh origin/master..

etc

If there's a pre-existing way of doing this, I'm all ears, naturally [1]

OK for trunk? (and of course, the contrib/ChangeLog entry will no doubt
conflict, irony of ironies).

Dave

[1] gnulib appears to have a "git-merge-changelog", but that requires
building/installing it at the receiving end
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