sw: DOCX export fix non-well-formed XML if hyperlink followed by ruby

If a hyperlink ends on the same position as a ruby starts, the hyperlink is
not closed before the ruby so its end tag is written inside the ruby
element.  Example: fdo82849-1.odt

Change-Id: I4531327ee23a99e366c2de5d9b08ddabb1be69c7
(cherry picked from commit 84ea33ef)

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -2125,6 +2125,12 @@ void DocxAttributeOutput::RawText( const OUString& /*rText*/, bool /*bForceUnico
 void DocxAttributeOutput::StartRuby( const SwTextNode& rNode, sal_Int32 nPos, const SwFormatRuby& rRuby )
 {
     OSL_TRACE("TODO DocxAttributeOutput::StartRuby( const SwTextNode& rNode, const SwFormatRuby& rRuby )" );
+    if (m_closeHyperlinkInThisRun)
+    {
+        EndRun(); // end hyperlink before starting ruby to avoid overlap
+        assert(!m_closeHyperlinkInThisRun);
+        assert(!m_closeHyperlinkInPreviousRun);
+    }
     m_pSerializer->startElementNS( XML_w, XML_ruby, FSEND );
     m_pSerializer->startElementNS( XML_w, XML_rubyPr, FSEND );
     // hps