Now on http://spec.commonmark.org. Changes from 0.13:
Clarified indented code blocks. Previously the spec said, wrongly,
that a blank line was needed between a paragraph and a following
code block. It is only needed between a code block and a following
paragraph (due to lazy continuations). (Thanks to textnut.)
Added definitions of whitespace, unicode whitespace, punctuation,
ASCII punctuation (#108).
Improved rules for emphasis and strong emphasis. This improves
parsing of emphasis around punctuation. For background see
http://talk.commonmark.org/t/903/6. The basic idea of the change
is that if the delimiter is part of a delimiter clump that has
punctuation to the left and a normal character (non-space,
non-punctuation) to the right, it can only be an opener. If it has
punctuation to the right and a normal character (non-space,
non-punctuation) to the left, it can only be a closer. This better handles
**Gomphocarpus (*Gomphocarpus physocarpus*, syn. *Asclepias physocarpa*)**
**foo "*bar*" foo**
Added test case for link-in-link-in-image (#252).
Fixed broken internal references.
Added another example of an unclarity in the canonical Markdown
Reworded the principle of uniformity to be more general; it applies
to all container blocks, not just list items.
Added a rule for empty list items (#242).
Clarified precedence of empty list items over setext header lines
Added an example with two blank lines in fenced code in a sublist (#180).
Added an explicit CC-BY-SA license to the spec (#55).