Extension highlights are not compatible with Chrome's text fragment links

[carlgieringer]

If the prefix/exact/suffix starts/ends in the middle of a word, Chrome's will not scroll or highlight the text fragment.

E.g. dom-anchor-text-quote produces a prefix/suffix like the following:

https://kr.usembassy.gov/martin-luther-king-jr-dream-speech-1963/#:~:text=n%20oasis%20of%20freedom%20and%20justice.%0A-,I%20have%20a%20dream%20that%20my%20four%20little%20children%20will%20one%20day%20live%20in%20a%20nation%20where%20they%20will%20not%20be%20judged%20by%20the%20color%20of%20their%20skin%20but%20by%20their%20character.,-%0AI%20have%20a%20dream%20today.%0AI%20have%20a%20

But Chrome will only scroll to the link if we remove all newlines (%0A) and if the prefix text uses complete words (replace n%20oasis with an%20oasis.)

An (easy?) fix would be to expand the selection start/end not to split a word.

[carlgieringer]

We could work around this by enforcing that ranges added to Howdju must start/end on a word boundary.

[carlgieringer]

Relevant links:

• https://web.dev/text-fragments/
• https://github.com/GoogleChromeLabs/text-fragments-polyfill
• https://wicg.github.io/scroll-to-text-fragment/