Parameters missing from function call

[nmartensen]

According to
https://lazka.github.io/pgi-docs/Vte-2.91/classes/Terminal.html#Vte.Terminal.spawn_async
and
https://lazka.github.io/pgi-docs/#Vte-2.91/classes/Pty.html#Vte.Pty.spawn_async
the order of arguments includes:
..., spawn_flags, child_setup, timeout, ...

However, the code does not work when trying to use that argument order,
the result is: TypeError: Argument 9 does not allow None as a value

It would be great if the code and its documentation would match.

An example illustrating that there must be in fact two arguments
between the spawn_flags and the timeout can be found here:
https://stackoverflow.com/questions/55105447/virtual-python-shell-with-vte-pty-spawn-async

According to advice received in
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=996084#10
this is probably a bug in the documentation-generating tool. Is this pgi-docgen?