This allows us to write doctests depending on a ui object, but not on global
configs.
ui.load() is a class method so we can do wsgiui.load(). All ui() calls but
for doctests are replaced with ui.load(). Some of them could be changed to
not load configs later.
Python 2.6 introduced the "except type as instance" syntax, replacing
the "except type, instance" syntax that came before. Python 3 dropped
support for the latter syntax. Since we no longer support Python 2.4 or
2.5, we have no need to continue supporting the "except type, instance".
This patch mass rewrites the exception syntax to be Python 2.6+ and
Python 3 compatible.
This patch was produced by running `2to3 -f except -w -n .`.
Several places that use ui.configlist, predominantly in authentication
scenarios need to interface with systems that can contain spaces in usernames
(e.g. when client certificates are usernames, or Windows usernames).
This changeset introduces a parser that supports quoting of strings, and
escape quotation marks that get decoded into a single quotation mark that
adopts the usual behavior one would expect from quoting strings. The Python
library shlex module is not used, on purpose, as that raises if it cannot
match quotation marks in the given input.