This is done in preparation for the next commit where a new FatalError
function is introduced. FatalErrorf follows common convention to append
'f' for functions accepting format arguments.
-BEGIN VERIFY SCRIPT-
sed -i 's/FatalError/FatalErrorf/g' $( git grep -l 'FatalError')
-END VERIFY SCRIPT-
Do not error on valid format specifications like strprintf("arg2=%2$s arg1=%1$s arg2=%2$s", arg1, arg2);
Needed to avoid lint error in upcoming commit: https://cirrus-ci.com/task/4755032734695424?logs=lint#L221
Additionally tested with python -m doctest test/lint/run-lint-format-strings.py
Previous bilingual_str tinyformat::format accepted bilingual format strings,
but not bilingual arguments. Extend it to accept both. This is useful when
embedding one translated string inside another translated string, for example:
`strprintf(_("Error: %s"), message)` which would fail previously if `message`
was a bilingual_str.
