#488 prepare URIs

[engelbert gruber]

groff_man_style on hyperlinks

The arguments to .MR, .MT, and .UR should be prepared for typesetting

1. Use special character escape sequences to encode Unicode basic Latin characters where necessary, particularly the hyphen-minus.
2. URIs can be lengthy; ... the application of non-printing break point escape sequences \: after each slash (or series thereof), and before each dot (or series thereof) is recommended
3. Consider adding break points before or after at signs in email addresses, and question marks, ampersands, and number signs in HTTP(S) URIs.

[engelbert gruber]

1. \: to give breaking points.
2. prefix reference with \% to disallow hyphenation
3. think about the hyphen-minus

[Günter Milde]

The bug is fixed in Docutils 0.22 released 2025-07-29.