templater: handle None returned from templatedir() My recent 91aa9bba3dc9 (templater: make templatepaths() return a single path, or None, 2020-07-21) didn't account for the fact that `templatedir()` returns `None` in frozen binaries. That is ironic, since the reason I'm working on this is to add support for built-in mapfiles in frozen binaries. This patch updates the callers to handle the `None` case. It's somewhat ugly, but I will have to revisit this soon anyway, since my goal is to make all callers handle that case by trying to read the map file using the resources API instead. Differential Revision: https://phab.mercurial-scm.org/D8810

tests: glob 'mercurial.error' in test-phases.t On python 2 with chg, `mercurial.error` is omitted while printing error. On other cases it's there in error message. I did tried to understand what might be the cause was unable to find one on quick skim through the code.

infinitepush: remove unused import to tempfile Spotted by test-check-pyflakes.t