10552: fix: Fix missing_fields diagnostic fix replacing wrong text ranges r=Veykril a=Veykril
Fixes#5393 by replacing the problematic behaviour there with a new "problem"
It replaces the correct range now, but it potentially discards the whitespace in the macro input. This is the best we can do currently until we get a formatter.
bors r+
Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
6c7526d308