Following up on the previous commit, change the GitHub Legacy callout
renderer to render the same as the refactored modern renderer.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
* Remove some deadcode
* Use 2-word name for CSS class names
* Remove "gt-*" rules for sanitizer
The UI doesn't change much.
(cherry picked from commit 66902d89e567ab1ae6dfb828636999c61ff0149e)
Although GitHub removed support for the legacy callout syntax, we don't
have to! Restore this support via another AST transformer.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
This lifts out the GitHub callout transformer from
`modules/markup/markdown/goldmark.go` to `callout/github.go`.
While there, clean up the transformer code:
- Use a map to look up supported callout types, rather than a regexp.
- Allow the callout type to be in any case, rather than just uppercase.
- Simplified `.Segment.Value()` to `.Text()`.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
