ui: add configlist doctest to document a bit more of the whitespace behavior
I'm surprised this wasn't explicitly tested, so I added a test.
--- a/mercurial/ui.py Wed Nov 01 17:19:45 2017 -0500
+++ b/mercurial/ui.py Wed Oct 25 23:01:54 2017 -0400
@@ -695,6 +695,9 @@
>>> u.setconfig(s, b'list1', b'this,is "a small" ,test')
>>> u.configlist(s, b'list1')
['this', 'is', 'a small', 'test']
+ >>> u.setconfig(s, b'list2', b'this, is "a small" , test ')
+ >>> u.configlist(s, b'list2')
+ ['this', 'is', 'a small', 'test']
"""
# default is not always a list
v = self.configwith(config.parselist, section, name, default,