tests: update output for shorted prompts from Mercurial
This makes tests pass again after Mercurial commits 4764e8436b2a
(filemerge: make last line of prompts <40 english chars (issue6158),
2019-06-20)
CORE-TEST-OUTPUT-UPDATE: 4764e8436b2a
#require test-repo pyflakes
Copied from Mercurial core (60ee2593a270)
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg locate -I 'set:(**.py or grep("^#!.*python")) - removed()' 2>/dev/null \
> | xargs pyflakes 2>/dev/null