view CONTRIBUTING @ 32489:bce5ebe72859

bookmarks: warn about bookmark names that unambiguously resolve to a node (BC)

I just burned myself on this today because I left out the -r in my `hg
bookmark` command, which then left me confused because I didn't notice
the bookmark I created in the wrong place that was silently shadowing
the revision I was trying to check out. Let's warn the user.

This patch only enforces the check on bookmark names 4 characters long
or longer. We can tweak that if we'd like, I selected that since
that's the fewest characters shortest will use in the templater
output.

A previous version of this patch rejected such bookmarks. It was
proposed during review (and I agree) that the behavior change for a
bookmark named "cafe" or similar as history accumulated was a little
too weird, but that the warning definitely has merit.

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