it was not done completely in #3314
(`user` attr needed addition)

not sure this is correct in the attrs, but
I'm not changing it:
data (:obj:`str` | :obj:`object`)
(it's only `str` in args)

* not sure I had to add the note for `invite_link` to args,
but it is there in Telegram API

* Telegram API contains no explicit limit
for `name` arg/attr

`file_size` in attrs had wrong type too

it's not really needed, but at least monospace
font was in place, I think, so why not put a reference

from reading the docstr it isn't clear that it's
a method of Bot

I think the 2nd part of docstring for `start_parameter`
 can be useful to understand this attr, despite
 the phrase addressing the generation of the Invoice

…cumentData`

…-attrs-3109