inifile: make it possible for expand() to comment out settings without assigning new value For completeness, when we already can create and update values, also make it possible to delete. This fits nicely into the implementation. Potentiallly "nice to have" but not used yet. The ini file is a text file and it only really makes sense to set string values. Intuitively, it makes sense that setting something to None means that the old value should be commented out but no new value should be set. If we want to set a value of "None", then specify "None" - not None.

[pytest]
# only look for tests in kallithea/tests
python_files = kallithea/tests/**/test_*.py
addopts =
    # --verbose
    # show extra test summary info as specified by chars (f)ailed, (E)error, (s)skipped, (x)failed, (X)passed, (w)warnings.
    -rfEsxXw
    # Shorter scrollbacks; less stuff to scroll through
    --tb=short
    #
    --doctest-modules
    --doctest-ignore-import-errors