fix didChange notification offset encoding #6921
Merged
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Fixes rust-lang/rust-analyzer#14679
In #5894 I overlooked that the incremental sync code manually transcodes char positions to utf16 line/column offset. This could cause server crashes for LSP servers that support utf8 or utf32 when editing on the same line after a non-ascii character.
This issue has been noticed by quite a few people both on matrix and in various github comments (for example #6594 (comment)) altough we don't have an issue for it in our repo