Markdansi 0.1.3

Highlights

• Collapse bulletized/fenced lists of code blocks into a single block to avoid per-line boxes in chatty patches.
• Auto-tag unfenced diffs (diff --git / --- a/ / @@) and render them as diff code blocks without wrapping so alignment stays intact.
• Render single-line code blocks without a surrounding box; multi-line blocks keep boxes.
• Added regression tests for code-list collapsing, diff detection/no-wrap, and single-line unboxed rendering.