Adam Zadrożny 397ac3a333 Fix utf8string.at ...

It was decoding the first rune in the case when it
was supposed to decode the rune before the last one.

Also added some tests to verify its behavior.

2026-10-27 20:15:54 +01:00

..

string.odin

Fix utf8string.at

2026-10-27 20:15:54 +01:00