Fixes markdown rendering details where Gitea deviated from GitHub
unintentionally, and adds a `/devtest/markdown` page to review markdown
rendering.
- Paragraphs get the intended 1.5 line height
- Blockquotes, alerts and definition lists no longer inherit browser
default margins
- Loose task lists keep their spacing, the checkbox renders inside the
paragraph like on GitHub
- Footnote references render as `[1]` so adjacent ones stay apart
without CSS
- Code in headings, headings in summaries, nested ordered lists, tables,
`<mark>`, alert icons and `<hr>` follow GitHub
Co-authored-by: bircni <bircni@icloud.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Close#34511Close#34590
Add comment ID to the footnote item's id attribute to ensure uniqueness.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
* Fix#33972
* Use consistent path resolving for links and medias.
* No need to make the markup renders to resolve the paths, instead, the
paths are all correctly resolved in the "post process" step.
* Fix#33274
* Since 1.23, all paths starting with "/" are relative to current render
context (for example: the current repo branch)
* Introduce `/:root/path-relative-to-root`, then the path will be
rendered as relative to "ROOT_URL"
