2be0e6586e
CommonMark fence scanner (a closing fence is at least as long as the opening one, tilde fences, quote prefixes), used by every fence scan in the note view; math: Bmatrix, Vmatrix, smallmatrix, array, align, hline, lenient parse where an unknown command becomes one red atom; plain/text/txt code blocks are no unknown language; corpus test against pulldown-cmark over the help vault (0 disagreements on 179 notes). Adds the render audit of the help vault (20 findings). Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>