- Fixes the following errors, when opening online-help.qhc using Qt assistant: QTextBrowser: No document for qthelp://cppcheck.sourceforge.net/doc/./preferences.html etc. - Furthermore, ./ is not used anymore in Qt documentation: https://doc.qt.io/qt-5/qtassistant-simpletextviewer-example.html It was used previously: https://doc.qt.io/archives/qt-4.8/qt-help-simpletextviewer-example.html Example: <section title="Find File" ref="./findfile.html"> -> <section title="Find File" ref="findfile.html">