Adds a comparison variant to [type] which ignores when combining characters of the expected field are missing from the provided input. It still shows these characters in the 'expected' line for reference.
It's useful for languages with e.g. diacritics that are required for reference (such as in dictionaries), but rarely actually learned or used in everyday writing. Among these languages: Arabic, Hebrew, Persian, Urdu.
The bool 'combining' controls it as new final parameter of both relevant compare_answer functions. On the Python side, it's set to true by default.
Use on the note templates: [type:nc:field] (only the front needs to include :nc)
This also removes the need to have both variants of words/sentences present as separate fields, to show them redundantly, etc.
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