parsers: strictly check for 20-byte hashes where they're required

templater: handle SyntaxError when parsing ui.logtemplate Before, Mercurial would crash with a traceback ending with SyntaxError: unmatched quotes if you configured [ui] logtemplate = {rev}\n The SyntaxError is now catched and the string is re-parsed without requiring quotes.

i18n-pt_BR: synchronized with 95ca6c8b38da

progress: fix indentation

test-progress: fix whitespace typo

merge with stable

tests: unify the last sh tests This requires a slightly smarter check-code check for sed output filtering.

tests: run most check-code sh checks on continued lines too Some false errors are degraded to warnings and whitelisted.