https://ota-meshi.github.io/eslint-plugin-regexp/rules/unicode-escape.html
regexp/unicode-escape | eslint-plugin-regexp
enforce consistent usage of unicode escape or unicode codepoint escape
unicode escaperegexpeslintplugin
https://manpages.ubuntu.com/manpages/xenial/man3/Unicode::Escape.3pm.html
Ubuntu Manpage: Unicode::Escape - Escape and unescape Unicode characters other than ASCII
Escape and unescape Unicode characters other than ASCII
unicode escapeubuntumanpagecharactersascii
https://manpages.ubuntu.com/manpages/resolute/man1/utf8-to-cif.1.html
Ubuntu Manpage: utf8-to-cif - convert Unicode characters into CIF escape sequences.
convert Unicode characters into CIF escape sequences.
unicode charactersubuntumanpagecif