Content: Comments

Agree a standard for optional text, that is commented out and then enabled...

Suggested standard:

• %% .... %% for instructions and comments to maintainers
• <!-- .... --> for things that may be activated (either on one line, or split, depending on context)
  • Never use this for multi-line sections, where activating individual lines means moving some text up or down.
  • Instead, comment out each individual line separately
• <https://> as a placeholder for a commented-out URL
  • So it's obvious where the URL goes, and that it can be pasted in directly
  • and this will make it more likely that ^ marker will be retained
  • It's important that there are no spaces after the ^marker, for it to work and display correctly