dirs: inline string macros
The old code happened to work because of how the macro was defined.
This no longer works in Python 3. Furthermore, assigning to a macro
just feels weird. So just inline the macro.
# 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