Supply more friendly error message when `=` is missing pre-or-post space
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- Dominant language
- TypeScript
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- 188
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- 64
- Avg merge
- 8d 21h
- Merged PRs (30d)
- 4
Description
In Assignment rules, you must have at least one space before and after the `=`, else ANTLR fails to parse it. We could probably intercept these ANTLR messages and provide a more user-friendly variant.
See: https://chat.fhir.org/#narrow/stream/215610-shorthand/topic/Escaping.20Strings
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