encoding: tune fast-path of tolocal a bit

eol: remove left-over print statements

eol: document why os.utime doesn't work here I wanted to use os.utime(self.join("eol.cache"), None) as a cleaner way of touching the cache file -- but this fails when the cache doesn't exist.

merge with stable

merge with i18n

i18n-pt_BR: fix format.dotencode help section

i18n-pt_BR: synchronized with 3d26d69ef822

changelog: micro-optimizations to changelog.read()

perf: add a changeset test

convert: deal with empty splicemap path (issue3311)