Rework word completion: 3 new parser functions #1526
Draft
+76
−34
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One step towards #1491
Fixes #1527
Some new parser functions are introduced that are better at reliably detecting word boundaries with multi-byte characters by not using iter functions to do this. These functions are also easier to use when editing the middle of a word. Words at start of document are parsed correctly
The plugin/completion-provider logic is essentially unaltered.
Some extra logic was required to adapt the results of the new functions to completing selections.