App. H: Tokens $7A and $7B Missing

[tajmone]

NOTE 1 — These changes were originally part of Issue #65, and then moved here to create an independent Issue (see NOTE 2 below).

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• Get @tessman approval for these changes.
• In Appendix H: Code Patterns, add missing tokens:
  • $7A addcontext
  • $7B video
• Document their addition in:
  • CHANGES.md.
  • README.md » Changelog.

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In his annotated PDF, @roodyyogurt pointed out that two tokens are missing in Appendix H: Code Patterns.

Although this would imply adding new contents to the book, it might be justified since App. H is supposed to list all Hugo tokens, and therefore fall within the goals of the original book.

But, of course, this needs to be discussed and evaluated first.

If we decide no to add the missing tokens, we could then at least add an admonition mentioning the problem.

NOTE 2 — There were other tokens-related problems, pointed out by Roody, which were addressed and fixed in #65. The reason these specific changes were moved to a separate Issue is because they imply adding new contents — which might be beyond the current goals of this project, so it might be better to handle them separately from the other fixes.

[tajmone]

See also what was already discussed on these addition, in #65:

• @tajmone on Moving From Preservation to Update?
• @roodyyogurt reply