.editorconfig

tests: add a cat of `error.log` in subrepo test

This made some debugging a lot less painful when something was broken,
and it costs us almost nothing, so I figure we may as well leave it
in.

Differential Revision: https://phab.mercurial-scm.org/D2853

# 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