Unit tests for the R indent script
Summary: A series of unit tests as was request in this previous review of the R indent script.
Test Plan: The tests were... well, tested using kateindenttest built from sources (master) and were running OK.
Reviewers: KTextEditor, RKWard, cullmann
Reviewed By: KTextEditor, cullmann
Subscribers: cullmann, kwrite-devel, kde-frameworks-devel
Tags: Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D15350