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`deepseq-1.4.0.0`'s major change is in the default `rnf` method
implementation (see haskell/deepseq#1 for details). However, `Cabal` isn't affected
by that, and happily compiles against the current (yet unreleased) `deepseq-1.4.0.0`.

(approved by @dcoutts)

Prettify code to ensure compilation with -XNoMonomorphismRestriction

docs: change detailed-1.0 to detailed-0.9

It's not clear to me that there even is a detailed-1.0. I searched around the repository for something about it and I don't see anything.

Fixes #2211.

Bug fix: packagesThatDependOn should go through the fake map.

This fix got dropped shuffling PRs around when we committed
ff6c718b

'sandbox delete': exit with 0 even with 'require-sandbox: True'

Fixes #2203.

Consolidate exposed-modules and reexported-modules in InstalledPackageInfo

A note first: this patch does NOT modify the user-facing experience in Cabal
files; it only changes how we register information in the installed package
database.

This patch takes the exposed-modules and reexported-modules fields in
the InstalledPackageInfo structure and consolidates them into just the
exposed module fields, which now has a Maybe flag indicating if a
module is reexported and, if it is, what the original module was.  I've
also added in a field for signatures although it is currently unused.

The big benefit of this change is that it will make processing at the GHC level
much more uniform when we add signatures: signatures can also be reexported
and the new representation means we can share the code.
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Fixes #2198.

Switch InstallPlan over to using IPID-indexed PackageIndex.

Remove build-depends from pkgDescrFieldDescrs

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Fixes #2195.

cabal-install: Fix PackageTests using user's config

- add struct PackageTests.PackageTester.TestsPaths
- contains absolute paths for cabal, ghc, cabal-config
- refactor to consequently use this as input for all tests

Fixes #2078.

- previously, tests did not specify config file; default one in ~/.cabal/
  was used. test result depended on non-repository content.
- now, PackageTester has extra parameter for config-file to use.
- the default procedure now is to generate a default config file in
  "PackageTests/cabal-config" and use that.
- specific tests also are able to use non-default config.

That commit prevented 'sdist' from printing distribution quality warnings.

Fixes #1863.

Remove all references to Data.Version.versionTags

Avoids deprecation warnings when versionTags is deprecated in GHC 7.10
(GHC ticket #2496)

Fixes #2060.

And should be faster.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>