Tracked text changes visualized as a single, standalone XHTML file. Versions, revisions, history, diff on the character level while retaining the chronological order, so no after-the-fact heuristical diff can obscure how a text actually was developed/composed.

Download: https://hypertext-systems.org/downloads.php#change_tracking_text_editor_1
Example: https://skreutzer.de/htx/de_skreutzer_20181104T160224Z_personal_hypertext_report_9.xhtml
Background: https://skreutzer.de/htx/de_skreutzer_20180719T210601Z_change_tracking_text_editor.txt, https://skreutzer.de/htx/de_skreutzer_20181104T160224Z_personal_hypertext_report_9.txt, https://skreutzer.de/htx/de_skreutzer_20181111T221800Z_personal_hypertext_report_10.txt