patchbomb: add test that shows --to and --cc override matching config item
As far as I know this has always been true and is intentional (it's in
line with many other behaviors), but it wasn't tested.
# 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