Fix crash on invalid formattime #1317
Merged
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Description
Fixes #1290, by checking for an error when formatting with chrono.
Edit: Also updates chrono to use the write_to API.
Additional Notes
If you would like i could also update chrono, which would allow to use the write_to method instead of the rust write! macro. This would probably be faster and it would be more obvious why there could be an error. This also would remove the need to importfmt::WriteMaybe this could be made into a function, but because the Chrono time objects are generic with different types of time this isn't obvious how to do, so i just didn't.
Checklist
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cargo fmtto automatically format all code before committing