[PATCH] Fix _quote to accept subclasses of 'str' and 'long'

Hi,

Here's a patch that fixes a problem in _quote for instances of a subclass of
'str'.

pyPgSQL quotes values depending on their type, and uses type() to check the
value type. Because of that, instances of a subclass of 'str' are not
processed by PgQuoteString like they should. I noticed the problem because
util.FieldStorage in mod_python returns instances of a class called
'StringField', which is a subclass of 'str'.

The patch also contains a fix for Connection.unlink that hadn't been
commited from my last patch. As I received no negative comment about it, I
assume that it had been forgotten. Please comment if something is wrong.

Laurent Pinchart


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