fix: split diagnostic lines on \n character in floating window #1438
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This PR attempts to help display diagnostic messages in a more graceful way.
Before, newline characters ('\n') in diagnostic messages were simply stripped out. This PR instead writes them out to a separate line
Before
After
Ideally, it'd be nice to not display the horizontal lines so it's more clear certain lines are meant to be grouped together but I wasn't entirely sure how to do that.
Open to feedback!