On tst_qwebenginepage.cpp, indenting is sometimes wrong

When I load qtwebengine.pri and open qt5/qtwebengine/tests/auto/widgets/qwebenginepage/tst_qwebenginepage.cpp and press <return> on tst_QWebEnginePage::elementCenter or any subsequent methods' opening curly-brace, the new line is indented with 25 spaces (or 21 on tst_QWebEnginePage::proxyConfigWithUnexpectedHostPortPair) instead of 4.

This also happens on the code lines within the methods. It also messes up copy-n-pasted code.

I have seen similar problems within complex string constructions, for example on any (except the last) of these lines (but not on lines before them):

    ...
    responseBody = (QStringLiteral(
        "<s:Envelope>"
          "<s:Body>"
            "<u:") + actionName + "Response>"
            "</u:" + actionName + "Response>"
          "</s:Body>"
        "</s:Envelope>").toUtf8();