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Oleg Grenrus authored
This commit reworks how GenericPackageDescription is parsed from `[Field Position]` and pretty-printed to `Doc`. This also fixes few issues: - Fix #4697: `cabal format` doesn't output custom-setup stanza (nor foreign-lib stanzas) - Fix #4719: `parse . pretty . parse = parse` for all Hackage cabal files. - `parser-hackage-tests roundtrip` is the test program. The handling of `license-file` and `license-files` is changed. Now they behave the same.
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