view docs/figures/hgview-example.png @ 5665:dd9dba7c1d00

compat: make topics compatible across change to cmdutil.commitstatus()

`cmdutil.commitstatus()` was changed in
https://phab.mercurial-scm.org/D9257 so it has a new `tip`
argument. This patch adds compatibility with that. It was harder than
I expected because the callers all pass the arguments as positional,
so we can't look for `opts` or `tip` in the `kwargs`. I instead
extracted much of the override to a helper. I think the result is
okay.

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