merge: convert repo.wwrite() calls to wctx[f].write()
As with the previous patch in this series, workingfilectx.write() is a direct
call to repo.wwrite(), so this change should be a no-op.
# 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