tests: prevent printing \r to stdout
Like we've done in other recent commits, we need to change
sys.stdout on Python 3 to not use os.linesep so output is
consistent on Python 3 on Windows.
With this change, test-notify.t now passes on Python 3 on Windows!
Differential Revision: https://phab.mercurial-scm.org/D8342
$ hg init
$ touch a
$ unset HGUSER
$ echo "[ui]" >> .hg/hgrc
$ echo "username= foo" >> .hg/hgrc
$ echo " bar1" >> .hg/hgrc
$ hg ci -Am m
adding a
abort: username 'foo\nbar1' contains a newline
[255]
$ rm .hg/hgrc
$ HGUSER=`(echo foo; echo bar2)` hg ci -Am m
adding a
abort: username 'foo\nbar2' contains a newline
[255]
$ hg ci -Am m -u "`(echo foo; echo bar3)`"
adding a
transaction abort!
rollback completed
abort: username 'foo\nbar3' contains a newline!
[255]