Gavin Baker 99aae9b834 Improve error message and snippet for "did you mean x" ...

- Fixes #36164
- Part of #35233
- handles unknown fields
- uses UI-style tests
- update all related tests (cfail, ui, incremental)

2016-10-02 15:57:39 +11:00

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issue-36798_unknown_field.rs

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issue-36798_unknown_field.stderr

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issue-36798.rs

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issue-36798.stderr

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