resolves #589 basic support for resolving xref from reftext
Merge pull request #793 from mojavelinux/issue-589

resolves #589 allow cross references by title
add cucumber test for superscript and subscript
fix padding top on toc
resolves #569 add proper grid and frame styles for tables
Merge pull request #1011 from mojavelinux/issue-569

resolves #569 add proper grid and frame styles for tables
resolves #952 add print styles for book doctype
Merge pull request #1012 from mojavelinux/issue-952

resolves #952 add print styles for book doctype
resolves #960 clean out old fixtures from test suite
resolves #888 resolve fallback source language from source-language attribute

- resolve fallback source language from source-language document attribute
- map language attribute to source-language in legacy mode
- remove ~~~ form of fenced code block
Merge pull request #1013 from mojavelinux/issue-960

resolves #960 clean out old fixtures from test suite
Merge pull request #1014 from mojavelinux/issue-888

resolves #888 resolve fallback source language from source-language attribute
use ::File#split when dividing dirname from basename
resolves #718 use + and ++ as constrained and unconstrained passthrough

- change + to be constrained passthough (no monospaced formatting)
- change ++ to be unconstrained passthrough (no monospaced formatting)
  * same as $$
- change ` to be constrained monospace (no passthrough behavior)
- change `` to be unconstrained monospace (no passthrough behavior)
- remove inline attributes from inline constrained passthrough
- use compat-mode document attribute to reenable legacy behavior
- update compat file for compatibility with AsciiDoc Python
- update tests for both compatibility modes