Documentation

Remove functions and methods annotated with "moved-to".

GObject-introspection does not currently support nullability annotations, so we try to guess the nullability from the nullability annotations of the curresponding get/set methods, which in principle should be reliable.

Not every interface that provides signals/properties is marked as requiring GObject, but this is necessarily the case, so fix the introspection data accordingly.

Some libraries include duplicated flags by mistake, drop those.

Sometimes arguments are marked as being a user_data destructor, but there is no associated user_data argument. In this case we drop the annotation.

Closures are often incorrectly assigned, with the closure annotation on the callback, instead of in the closure (user_data) parameter itself. The following makes sure that things are as they should.

The last argument of callbacks is often a user_data argument, but currently gobject-introspection does not have an annotation representing this. This is generally OK, since the gir generator will mark these arguments as (closure) if they are named user_data, and we do the right things in this case, but recently there has been a push to "fix" these annotations by removing them without providing any replacement, which breaks the bindings. See https://gitlab.gnome.org/GNOME/gobject-introspection/-/issues/450 Here we try to guess which arguments in callbacks are user_data arguments.

Some symbols have names that are not valid Haskell identifiers, fix that here.