fn first_letter_range(text: &str) -> Range<usize> ⓘExpand description
Computes the range of the first letter.
The range includes any preceding punctuation and white space, and any trailing punctuation. Any non-punctuation following the letter/number/symbol of first-letter ends the range. Intervening spaces within trailing punctuation are not supported yet.
If the resulting range is empty, no compatible first-letter text was found.