tests/test-revert-flags.t

keepalive: Do not append _rbuf if _raw_readinto exists (issue6356)

The readline method append to the chunks the content of the _rbuf then there
is a loop that call _raw_read which on Python3 call readinto. But the readinto
version in mercurial append again the _rbuf content. So this creates the
duplicate content. This does not happen in Python2 because _raw_read does not
call readinto.

Differential Revision: https://phab.mercurial-scm.org/D8859

#require execbit

  $ hg init repo
  $ cd repo
  $ echo foo > foo
  $ chmod 644 foo
  $ hg ci -qAm '644'

  $ chmod 755 foo
  $ hg ci -qAm '755'

reverting to rev 0

  $ hg revert -a -r 0
  reverting foo
  $ hg st
  M foo
  $ hg diff --git
  diff --git a/foo b/foo
  old mode 100755
  new mode 100644

  $ cd ..