copyright check pre-commit hook

[Ben Finney]

John Arbash Meinel <john at arbash-meinel.com> writes:

> Right. It is harder to review code that has a lot of lines 'changed'
> just because of trailing whitespace. In theory that was why we wanted
> to push to clean up the codebase and then force trailing whitespace to
> be removed (in pqm). Robert found it frustrating to have things
> rejected by pqm just because his editor left trailing whitespace that
> he didn't see, so that got pushed back.

The solution, of course, is to discover the trailing whitespace long
*before* it gets to pqm. Preferably, before committing at all.

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Ben Finney