We will still not render these comments, so from a safety perspective this is the same, but HTML comments are very common also inside Markdown and too useful to throw away.
Updates #13278
This issue fixes two cases where `{{__hugo_ctx` artifacts were left in the rendered output:
1. Inclusion when `.RenderShortcodes` is wrapped in HTML.
2. Inclusion of Markdown file without a trailing newline in some cases.
Closes#12854
Updates #12998
With Goldmark v1.7.1 and earlier, the Goldmark "strikethrough" extension was
triggered by wrapping text within a pair of double-tilde characters. With
Goldmark v1.7.2 and later, to provide full GFM compatibility, the Goldmark
"strikethrough" extension is triggered by wrapping text within a pair of
single- or double-tilde characters.
This change created a conflict with the Hugo Goldmark Extras "subscript"
extension.
When enabling the Hugo Goldmark Extras "subscript" extension, if you
want to render subscript and strikethrough text concurrently, you must:
1. Disable the Goldmark "strikethrough" extension
2. Enable the Hugo Goldmark Extras "delete" extension
Closes#12597
Enables inclusion of these HTML elements in Markdown:
- Inserted Text (++inserted++)
- Mark Text (==marked==)
- Subscript (H~2~O)
- Superscript (1^st^)
