Add documentation for GHC-21926 #514
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This is the card I drew during ZuriHac! 📇
This is quite a simple parser error, which can be hit when
PackageImportsis enabled. The error itself is quite clear already: don't put version numbers and non-alphanumeric characters in a package import.I'm not sure how one would get into the non-alphanumeric character situation (besides an honest typo), but the version one is quite a fair mistake to make.