py3: don't use dict.iterkeys() in hgext/fastannotate/context.py
dict.iterkeys() is not present on Python 3.
Differential Revision: https://phab.mercurial-scm.org/D4431
Matt Harbison <matt_harbison@yahoo.com> [Wed, 29 Aug 2018 23:39:58 -0400] rev 39379
run-tests: replace '/dev/null' with os.devnull for Windows
Many of the *.py tests were dying on:
File "c:\Users\Matt\projects\hg\hgdemandimport\tracing.py", line 27, in log
_pipe = open(os.environ['HGCATAPULTSERVERPIPE'], 'w', 1)
IOError: [Errno 2] $ENOENT$: '/dev/null'