Poorly formatted error messages with GHC HEAD

If you experience a GHC error with a recent enough GHC HEAD when building with `cabal-install`, the error messages' spacing is quite off. Here is an example:

```
$ cabal install -w ~/Software/ghc/inplace/bin/ghc-stage2
Resolving dependencies...
Notice: installing into a sandbox located at
/home/rgscott/Documents/Hacking/Haskell/bifunctors-5.4.1/.cabal-sandbox
Configuring distributive-0.5.0.2...
Failed to install distributive-0.5.0.2
Build log ( /home/rgscott/Documents/Hacking/Haskell/bifunctors-5.4.1/.cabal-sandbox/logs/distributive-0.5.0.2.log ):
cabal: Entering directory '.'
cabal: Leaving directory '.'
cabal: Error: some packages failed to install:
distributive-0.5.0.2 failed during the configure step. The exception was:
user error ('/u/rgscott/Software/ghc/inplace/bin/ghc-stage2' exited with an
error:

dist/dist-sandbox-2990f1c0/setup/setup.hs:8:31: error:
Module
‘Distribution.Package’
does not export
‘PackageName(PackageName)’
)
```

I've also seen:

```
$ cabal install -w ~/Software/ghc/inplace/bin/ghc-stage2
Resolving dependencies...
Notice: installing into a sandbox located at
/home/rgscott/Documents/Hacking/Haskell/bifunctors-5.4.1/.cabal-sandbox
Configuring distributive-0.5.0.2...
Failed to install distributive-0.5.0.2
Build log ( /home/rgscott/Documents/Hacking/Haskell/bifunctors-5.4.1/.cabal-sandbox/logs/distributive-0.5.0.2.log ):
cabal: Entering directory '.'
cabal: Leaving directory '.'
cabal: Error: some packages failed to install:
distributive-0.5.0.2 failed during the configure step. The exception was:
user error ('/u/rgscott/Software/ghc/inplace/bin/ghc-stage2' exited with an
error:

dist/dist-sandbox-2990f1c0/setup/setup.hs:38:44: error:
• Couldn't match type ‘Distribution.Package.PackageIdentifier’
with ‘PackageName’
Expected type: [(InstalledPackageId, PackageName)]
Actual type: [(InstalledPackageId, PackageId)]
• In the first argument of ‘formatdeps’, namely
‘(testDeps libcfg suitecfg)’
In the second argument of ‘($)’, namely
‘formatdeps (testDeps libcfg suitecfg)’
In the second argument of ‘(++)’, namely
‘(show $ formatdeps (testDeps libcfg suitecfg))’

dist/dist-sandbox-2990f1c0/setup/setup.hs:42:58: error:
• Couldn't match expected type ‘Data.Version.Version’
with actual type ‘Distribution.Version.Version’
NB: ‘Distribution.Version.Version’
is defined in ‘Distribution.Version’ in package ‘Cabal-1.25.0.0’
‘Data.Version.Version’
is defined in ‘Data.Version’ in package ‘base-4.9.0.0’
• In the first argument of ‘showVersion’, namely
‘(packageVersion p)’
In the second argument of ‘(++)’, namely
‘showVersion (packageVersion p)’
In the second argument of ‘(++)’, namely
‘"-" ++ showVersion (packageVersion p)’
)
```

My hunch is that this has something to do with GHC's new colorized error messages, but I'm not positive on that.