D26877: Simplify calls to whitespace() and use it in more places.

[Tomaz Canabrava]

tcanabrava added reviewers: dfaure, ervin.

REPOSITORY
  R237 KConfig

REVISION DETAIL
  https://phabricator.kde.org/D26877

To: tcanabrava, dfaure, ervin
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns
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