Remove extra newline before code block in doxygen python output

Remove a newline character that was added to the translated comments
prior to the code block.  This way the structure of the pydoc output
more closely resembles that of the original doxygen comments.
Updating tests accordingly.

Source/Doxygen/pydoc.cxx

@@ -496,7 +496,6 @@ void PyDocConverter::handleCode(DoxygenEntity &tag, std::string &translatedComme
   IndentGuard indent(translatedComment, m_indent);
 
   trimWhitespace(translatedComment);
-  translatedComment += '\n';
 
   // Use the current indent for the code-block line itself.
   translatedComment += indent.getFirstLineIndent();