Reconsider prefix handling
The handling of prefixes is, imo, just confusing.
I my pango docs, I have pango_layout_copy show up as
- "copy" in the sidebar
- "pango_layout_copy" in the list
- "Pango.Layout.copy" in its own page
I think as long as we are targeting the C api, the docs should always refer to a function by its full name, pango_layout_copy.
The same goes for struct and other names.