Port status: Textile markup parsing module

[sjnorton-aa]

Name of the module, theme, or layout you are working on Textile

Link to the drupal.org module, theme, or layout https://git.drupalcode.org/project/textile, https://www.drupal.org/project/textile

(Optional) Link to the drupal.org issue where you notified the Drupal maintainer(s) of this port https://www.drupal.org/project/textile/issues/3467041

Do you need assistance with this port? This will be my first attempt at porting something, so any advice would be appreciated. I don't know how many people use Textile markup anymore, but I have a bunch of old content on my aging Drupal 7 site that uses it, and I'm about to bring that site into Backdrop. I'd rather avoid trying to find and reformat those old posts, so here we are.

[sjnorton-aa]

First public development release is here: https://github.com/backdrop-contrib/textile Comments and testers welcome!