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This represents an incremental improvement over the current state.
However, there's more work to be done in terms of restructuring/reordering
to present the information in an easier to digest as well as apply the new
facilities effectively. This future work will be tracked in #4944.

[skip ci]

Foreign lib names not parsed by readp

travis-ci: bootstrap on 8.2.2 as well

Skip the Haddock step on macOS.

I don't think it ever uncovered any bugs that the Linux bot
missed. This should speed up the build a little.

[ci skip]

[ci skip]

[ci skip]

[ci skip]

Initial feature add: create both Library and Executable on cabal init

Modify replacement properties of `encodeStringUtf8`/`decodeStringUtf8`

[ci skip]

Do not create folders when failing on no .project or .cabal file

This changes `decodeStringUtf8` to not replace U+FFFE and U+FFFF into
U+FFFD, while `encodeStringUtf8` now replaces surrogate pairs
(i.e. code-points U+D800 through U+DFFF which are invalid in UTF-8)
with U+FFFD.

Consequently, `decodeStringUtf8 . encodeStringUtf8` can now properly
round-trip all scalar code-points
(i.e. [U+0000..U+D7FF] ∪ [U+E000..U+10FFFF]).

This should finally address #4644

Restore a few integration test comments and new-build package arguments.

#4909 changed the cabal-version of the package under test, so this commit
adjusts the versions of the Cabal libraries in the test to be consistent with
the cabal-version.

Some comments were lost in the migration to the new integration test suite.

Don't pass `other-modules` to stub executable for detailed-0.9

The stub executable is linked against the test-library
which already contains all `other-modules`, so we need
to remove those from the stub-exe's build-info to avoid
build errors due to duplication.

This addresses #4918

D.S.Program.Hpc: Use relative .mix search paths

Turn gen-extra-source-files into proper package

Prior to GHC 8.0, hpc requires relative search paths. We now pass relative paths
in all cases; we do not want to separately condition on GHC and HPC versions.

Have the solver reject packages with a too-new/unsupported spec-version

Relax bounds for aeson and optparse-applicative in test-suite