checkheads: gather the postprocessing with other obsolescence specific code
We extract this function from the loop and gather it with the rest of the
obsolescence specific code. That will help to clarify the move of the whole logic
inside the "heads summary" computation.
# 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