D26302: Port endl to "\n" + flush at the end

[Laurent Montel]

mlaurent added a reviewer: apol.

REPOSITORY
  R298 KDesignerPlugin

REVISION DETAIL
  https://phabricator.kde.org/D26302

To: mlaurent, dfaure, apol
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns