Update extensions for Extension.__init__ refactor

Fixes #325. All extensions can now accept a dict of configs or
**kwargs, not just a list of tuples. Third party extensions may want
to follow suite. Extensions may only accept keyword arguments
in the future. These changes still need to be documented.

A couple things of note:

The CodeHilite extension previously issued a DeprecationWarning
if the old config key `force_linenos` was used. With thins change,
a KeyError will now be raised.

The `markdown.util.parseBoolValue` function gained a new argument:
`preserve_none` (defaults to False), which when set to True, will
pass None through unaltered (will not convert it to False).

1 files changed, 5 insertions, 0 deletions

diff --git a/markdown/extensions/__init__.py b/markdown/extensions/__init__.py
index 296ce0c..2751eef 100644
--- a/markdown/extensions/__init__.py
+++ b/markdown/extensions/__init__.py
@@ -4,6 +4,7 @@ Extensions
 """
 
 from __future__ import unicode_literals
+from ..util import parseBoolValue
 
 class Extension(object):
     """ Base class for extensions to subclass. """
@@ -47,6 +48,10 @@ class Extension(object):
 
     def setConfig(self, key, value):
         """ Set a config setting for `key` with the given `value`. """
+        if isinstance(self.config[key][0], bool):
+            value = parseBoolValue(value)
+        if self.config[key][0] is None:
+            value = parseBoolValue(value, preserve_none=True)
         self.config[key][0] = value
 
     def setConfigs(self, items):