CommonMark 0.16

Spec changes

• Rewrote beginning of Entities section, clarifying that only entities not in code blocks or spans are decoded.
• Removed defective Example 449 (#284).
• Fixed typo (#283).
• Added intended two-space hard-breaks in Examples 521, 523.
• Clarified that brackets in general don't take precedence over emph (#258).
• Clarified that final newline is removed from paragraph content (#176).
• Talk of "info string" rather than "attributes" for code blocks (#262).
• Clarified precedence of code spans, HTML tags, autolinks (#259).
• Fixed a number of internal links and duplicate references in the spec.
• Linkify "info string" in spec.
• Use shortcut reference links when possible in spec.txt.
• cmark itself is now used to build spec.html, rather than pandoc.
• Use shortcut reference links when possible in spec.txt. This relies on the new spec2md.py behavior of creating references for all internal anchors.
• Moved some examples from block to inline HTML section.
• Added examples of non-comments (#264).
• Changed rule for comments to conform to HTML5 spec.
• Made clear that any sequence of characters is a valid document (#266).
• Changed wording: "is preferred" -> "takes precedence."
• Regularized spelling of "non-space character" and added links (#260).
• Use four spaces rather than five to show "four spaces is too much" (#261).

cmark/libcmark

• Added xml renderer (XML representation of the CommonMark AST, which is described in CommonMark.dtd).
• Reduced size of gperf entity table (Nick Wellnhofer).
• Reworked iterators to allow deletion of nodes during iteration (Nick Wellnhofer).
• Optimized S_is_leaf.
• Added cmark_iter_reset to iterator API.
• Added cmark_consolidate_text_nodes to API to combine adjacent text nodes.
• Added CMARK_OPT_NORMALIZE to options (this combines adjacent text nodes).
• Added --normalize option to command-line program.
• Improved regex for HTML comments in inline parsing.
• Python is no longer required for a basic build from the repository.

commonmark.js

• Improved regex for HTML comments (#263).
• Fixed CDATA regex (#267).
• Use linked list instead of arrays in AST: the same doubly linked node structure as cmark uses. This simplifies some code and eliminates the need for recursive algorithms, so we can render deeply-nested structures without stack overflows.
• Use children instead of label (in Image and Link), inline_content (in Paragraph), and c (in Emph and Strong).
• Renamed the c property to literal to match libcmark.
• Use literal rather than string_content property for code blocks, HTML. string_content is reserved for raw string content that has yet to be parsed as inlines.
• Improved end lines (#276).
• Added a node walker, for easy AST traversal (see node.js).
• Regularized position information into a sourcepos property. Added end column information.
• Renamed html-renderer.js to html.js.
• Replace NUL characters with U+FFFD, as per spec.
• Optimized code, resulting in significant performance gains. (We've gone from being twice as fast as showdown.js to being three times as fast, on par with marked.)
• Made tight a property of list_data rather than Node.
• Added options to renderer, parser objections.
• Added a --sourcepos command line option to js/bin/commonmark.
• HTML renderer now throws an error on unknown tag type (which indicates a programming error).
• Removed ansi.js code from the source tree. The test suite now uses its own mini ansi colors implementation.
• Added --time option to js/bin/commonmark.
• Added an XML renderer (XML representation of the AST, matching Commonmark.dtd).
• Changed url property to destination to match cmark and spec.
• Added js/common.js to hold some common code, like string unescaping and URI normalization.
• Use decodeURI instead of unescape.
• Added some "pathological" test cases to test suite.