This reverts commit 1ac2f956.

We now pass `-hide-all-packages` to haddock when invoking the
testsuite. This ensures we don't accidentally pick up any dependencies
up through ghc.env files.

Unicode operators are a pretty big thing in Haskell, so supporting linking them
seems like it outweighs the cost of the extra machinery to force Attoparsec to
look for unicode.

Fixes #458.

```
$ cabal new-run -- html-test --haddock-path=$(which haddock) --ghc-path=$(which ghc)
```

Alec Theriault authored 7 years ago and Alex Biehl committed 7 years ago

Brought back some mistakenly deleted code for handling encoding and eager
reading of files from e0ada174.

Alec Theriault authored 7 years ago and Alex Biehl committed 7 years ago

* Add 'show' option to complement 'hide'

The behaviour is for flags passed in the command line to override
flags in file headers. In the command line, later flags override
earlier ones.

Fixes #751 and #266.

* Add a '--show-all' option

Alec Theriault authored 7 years ago and Alex Biehl committed 7 years ago

No more clicking to figure out whether your bytestring is strict or lazy!

In https://github.com/haskell/haddock/issues/287 we found that
haddock-2.19.0 would miss documentation on class methods with
multiples names.

This patch uses expandSigDecls in a more sensible place.

This handles 'HsSpliceTy's by replacing them with what they expand to.
IIUC everything that is happening, 'renameHsSpliceTy' should not be
able to fail for the inputs we feed it from GHC.

This fixes #574.

This manually filters out '~' from the list of things to warn about. It truly
makes no sense to warn on this since '~' has nothing it could link to - it is
magical.

This fixes #532.

Links to pattern synonyms are now generated, as well as links from
modules in import lists.

Fixes #731.

C.f. SPDX 2.1 - Appendix V
 https://spdx.org/spdx-specification-21-web-version#h.twlc0ztnng3b

    The tag should appear on its own line in the source file, generally as part of a comment.

    SPDX-License-Identifier: <SPDX License Expression>

Cherry-picked from #743

The hyperlinker backend now classifies the content of pragmas as
'TkPragma'. That means that in something like '{-# INLINE foo #-}',
'foo' still gets classified as a pragma token.