https://api.html-tidy.org/tidy/tidylib_api_5.8.0/options.html
HTML Tidy: Tidy Config Options
html tidyconfigoptions
https://api.html-tidy.org/tidy/tidylib_api_5.8.0/group__console__application.html
HTML Tidy: Tidy Console Application
html tidyconsole application
https://pikchr.org/home/help/test-html-tidy
Pikchr: Help: test-html-tidy
html tidypikchrhelptest
https://api.html-tidy.org/tidy/tidylib_api_5.2.0/group__Configuration.html
HTML Tidy: Configuration Options
html tidyconfiguration options