langref: add paragraph and examples about indexing non-ASCII strings
PR #10610 addressed most of the points from #1854. This
additional paragraph and examples covers the OMISSIONS section
clarifying issues about indexing into non-ASCII strings (whether valid
UTF-8 or not). I think this finally closes #1854.
1fba88450dJosh Holland committed on 2/1/2023, 7:46:46 PM· committed by Veikka Tuominenparent86ec26b