.editorconfig

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'

# See http://EditorConfig.org for the specification

root = true

[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true

[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true

[*.t]
indent_size = 2
indent_style = space
trim_trailing_whitespace = false