Add rebase_relative_paths extension.

- Add manual entry for (non-default) extension
  `rebase_relative_paths`.
- Add constructor `Ext_rebase_relative_paths` to `Extensions`
  in Text.Pandoc.Extensions [API change]. When enabled, this
  extension rewrites relative image and link paths by prepending
  the (relative) directory of the containing file.
- Make Markdown reader sensitive to the new extension.
- Add tests for #3752.

Closes #3752.

NB. currently the extension applies to markdown and associated
readers but not commonmark/gfm.
This commit is contained in:
John MacFarlane
2021-05-27 10:38:25 -07:00
parent 0226d2320f
commit 834da53058
9 changed files with 111 additions and 9 deletions
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# Chapter two
A spider: ![spider](spider.png)