diffutils.cpp: In function 'QList<DiffEditor::RowData>
    DiffEditor::readLines(QStringRef, bool, bool*, bool*)':
diffutils.cpp:585:53: error: no match for 'operator+' (operand types are
    'QStringRef' and 'const QChar')

Change-Id: I44ad2237c033266d3832ce95174ec056ff7cae9f
Reviewed-by: Orgad Shaneh <orgads@gmail.com>