- make use of spaces and tabs in spec file consistent.
    - escape embedded macro text in %%changelog.
    - eliminate redundant %%version and %%release.
    - remove directory component from entries in Requires: and scriplets where
        possible.
    - remove redundant conditional check from %%clean.
    - remove redundant exit from %%preun.
    - correct %%defattr spec.
    - remove empty %%doc and redundant %%dir misc lines.
    - combine program module spec lines into simpler one line form.