Instead of manually writting XML line by line.
Quoting is automatic.
Makes it much easier to modify. (just add new elements)
Generated XML not indented at the moment.
* Create main() function and put its execution under
__name__ == '__main__' guard.
* Only one module import per line
* Use required=True to check if necessary arguments have
been passed.
* Remove usage() as ArgumentParser handles that already
The gtk-doc text that the tool receives is not XML, it's a plain text.
When setting the plain text as XML attribute, we need to properly escape
it. The previous XML escape code was naive, and didn't cover for a
plain ampersand.
(cherry picked from commit 1641cc1d03)
