Log Message:
textproc/hs-commonmark-pandoc: update to commonmark-pandoc-0.2.3

## 0.2.3

- Track wikilinks with a class instead of the title (Evan
  Silberman). The use of title="wikilink" in HTML output traces
  back to Pandoc's hijacking of the title attribute for this purpose
  back when Pandoc links didn't have Attrs. A coordinated change in
  Pandoc moves this more appropriately into a class.