[docs] [issue34580] sqlite doc: clarify the scope of the context manager

[Berker Peksag]

Berker Peksag <berker.peksag at gmail.com> added the comment:

PR 9079 looks good to me.

I think we can use this as an opportunity to make the rest of the examples in the sqlite3 documentation more consistent and add missing "conn.close()" calls.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34580>
_______________________________________