help: only call doc() when it is callable
`hg help -k` on my machine was aborting because the hg-prompt extension
was inserting a string and not a function into help.helptable and help
was blindly calling it.
This patch changes keyword searching to be more robust against
unexpected types.
i18n-pt_BR: synchronized with
6a8b8efb0641
i18n-ja: synchronized with
0c838e7459a5
i18n-pt_BR: synchronized with
0c838e7459a5
repoview: fix typo in repoview.changelog
Incidentally, this avoids the changelog cache being invalidated each time
it's accessed on a repoview.
On a filtering experiment on a repository the size of mozilla-central,
this makes a significant difference:
Before, running hg log -l 10 --time with about 8k changesets filtered out:
time: real 1.490 secs (user 1.450+0.000 sys 0.040+0.000)
After:
time: real 0.540 secs (user 0.530+0.000 sys 0.010+0.000)