Eugene Lomov 6a2b890545 Implemented bottom footnotes with backreferences (#2480)
* Implemented bottom footnotes with backreferences

Fixes #1285

* Added bottom_footnotes option to configuration.md

* Renamed fix_github_style_footnotes()

* Added tests for convert_footnotes_to_github_style()

* Changed test to plain html instead of Vec<Event>

* Added integration test for footnotes

* Applied suggested changes
2024-06-20 23:15:24 +02:00
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