Text Fragment Linking
test1 [text](link)
test2 [text][ref]
test3: https://example.com/#:~:text=illustrative%20examples
test4: https://example.com/#:~:text=illustrative%20examples
test5 <a href="">...</a> works
<a href="https://example.com/#:%7E:text=illustrative%20examples">
<a href="https://example.com/#:%7E:text=illustrative%20examples">
<a href="https://example.com/#:%7E:text=illustrative%20examples">
<a href="https://example.com/#:%7E:text=illustrative%20examples">
<a href="https://example.com/#:~:text=illustrative%20examples">
Using all allowed URL Code points in fragment
https://url.spec.whatwg.org/#url-code-points
test3: https://example.com/!$'()*+./:;=?@_~&,-
test4: https://example.com/!$'()*+./:;=?@_~&,-
<a href="https://example.com/#!$%27()*+./:;=?@_%7E&,-">
<a href="https://example.com/#!$%27()*+./:;=?@_%7E&,-">
<a href="https://example.com/#!$%27()*+./:;=?@_%7E&,-">
<a href="https://example.com/#!$%27()*+./:;=?@_%7E&,-">
<a href="https://example.com/#!$%27()*+./:;=?@_~&,-">
~: percent-encoded, unless<a>element used.': percent-encoded always