i18n-it: update many broken fuzzy messages
I started updating many fuzzy messages which no longer expressed the
intended meaning - new translations are inserted only to keep
coherence.
Not all fuzzy messages have been fixed, yet.
# should print nothing
# should fail
abort: path 'b/x' is inside repo 'b'
abort: path 'b/x' is inside repo 'b'
# should fail
abort: path 'b/x' is inside repo 'b'
# should arguably print nothing
# should fail
abort: path 'b/a' is inside repo 'b'