gnu: Fix whitespace issues in Haskell package descriptions.

This mainly addresses `double-space after sentence end period' and `trailing
white space' issues.

* gnu/packages/haskell-check.scm (ghc-tasty-expected-failure,
ghc-quickcheck-classes-base, ghc-doctest-lib): Fix description.
* gnu/packages/haskell-web.scm (ghc-hxt-unicode): Fix description.
* gnu/packages/haskell-xyz.scm (ghc-fsnotify, ghc-gtk2hs-buildtools,
ghc-operational, ghc-commonmark, ghc-template-haskell): Fix description.

Change-Id: I5a71ad41bbddf1ad4c880dacc0a53992a38c71ad
Signed-off-by: Vagrant Cascadian <vagrant@debian.org>

gnu/packages/haskell-check.scm

@@ -355,7 +355,7 @@ been added since previous test run.")
     (description
      "With the function @code{Test.Tasty.ExpectedFailure.expectFail} in the
 provided module @code{Test.Tasty.ExpectedFailure}, you can mark that you
-expect test cases to fail, and not to pass. This can be used for test-driven
+expect test cases to fail, and not to pass.  This can be used for test-driven
 development.")
     (license license:expat)))
 
@@ -1069,21 +1069,19 @@ constraints more cleanly.")
     (home-page "https://github.com/andrewthad/quickcheck-classes#readme")
     (synopsis "QuickCheck common typeclasses from `base`")
     (description
-      "This library is a minimal variant of `quickcheck-classes`
+      "This library is a minimal variant of `quickcheck-classes` that only
-that only provides laws for typeclasses from `base`. The main
+provides laws for typeclasses from `base`.  The main purpose of splitting this
-purpose of splitting this out is so that `primitive` can depend
+out is so that `primitive` can depend on `quickcheck-classes-base` in its test
-on `quickcheck-classes-base` in its test suite, avoiding the
+suite, avoiding the circular dependency that arises if `quickcheck-classes` is
-circular dependency that arises if `quickcheck-classes` is used
+used instead.  This library provides QuickCheck properties to ensure that
-instead. . This library provides QuickCheck properties to ensure
+typeclass instances adhere to the set of laws that they are supposed to.
-that typeclass instances adhere to the set of laws that they are
+There are other libraries that do similar things, such as `genvalidity-hspec`
-supposed to. There are other libraries that do similar things,
+and `checkers`.  This library differs from other solutions by not introducing
-such as `genvalidity-hspec` and `checkers`. This library differs
+any new typeclasses that the user needs to learn.  @emph{Note:} on GHC < 8.5,
-from other solutions by not introducing any new typeclasses that
+this library uses the higher-kinded typeclasses
-the user needs to learn. . /Note:/ on GHC < 8.5, this library
+(@code{Data.Functor.Classes.Show1}, @code{Data.Functor.Classes.Eq1},
-uses the higher-kinded typeclasses ('Data.Functor.Classes.Show1',
+@code{Data.Functor.Classes.Ord1}, etc.), but on GHC >= 8.5, it uses
-'Data.Functor.Classes.Eq1', 'Data.Functor.Classes.Ord1', etc.),
+`-XQuantifiedConstraints` to express these constraints more cleanly.")
-but on GHC >= 8.5, it uses `-XQuantifiedConstraints` to express
-these constraints more cleanly.")
     (license license:bsd-3)))
 
 (define-public ghc-doctest-lib
@@ -1101,7 +1099,7 @@ these constraints more cleanly.")
     (home-page "https://hub.darcs.net/thielema/doctest-lib/")
     (synopsis "Parts of doctest exposed as library")
     (description
-      "Parts of doctest exposed as library. For use with the doctest-extract utility.")
+      "Parts of doctest exposed as library.  For use with the doctest-extract utility.")
     (license license:expat)))
 
 (define-public ghc-doctest-exitcode-stdio

gnu/packages/haskell-web.scm

@@ -1508,7 +1508,7 @@ supported Unicode version is 7.0.0")
     (description
      "This package provides Unicode encoding and decoding functions for
 encodings used in the Haskell XML Toolbox.  ISO Latin 1-16, utf8, utf16, ASCII
-are supported. Decoding is done with lazy functions, errors may be detected or
+are supported.  Decoding is done with lazy functions, errors may be detected or
 ignored.")
     (license license:expat)))
 

gnu/packages/haskell-xyz.scm

@@ -4404,7 +4404,7 @@ definition of @code{Monad}.")
     (home-page "https://github.com/haskell-fswatch/hfsnotify")
     (synopsis "Cross platform library for file change notification")
     (description "Cross platform library for file creation, modification, and
-deletion notification. This library builds upon existing libraries for platform
+deletion notification.  This library builds upon existing libraries for platform
 specific Windows, Mac, and Linux file system event notification.")
     (license license:bsd-3)))
 
@@ -4745,10 +4745,10 @@ monoid with invertibility.")
     (synopsis "Tools to build the Gtk2Hs suite of user interface libraries")
     (description
      "This package provides a set of helper programs necessary to build the
-Gtk2Hs suite of libraries. These tools include a modified c2hs binding tool
+Gtk2Hs suite of libraries.  These tools include a modified c2hs binding tool
 that is used to generate FFI declarations, a tool to build a type hierarchy
 that mirrors the C type hierarchy of GObjects found in glib, and a generator
-for signal declarations that are used to call back from C to Haskell. These
+for signal declarations that are used to call back from C to Haskell.  These
 tools are not needed to actually run Gtk2Hs programs.")
     (license license:gpl2)))
 
@@ -8302,7 +8302,7 @@ found at runtime, a userError is thrown.")
      "Implementation of difficult monads made easy with operational semantics")
     (description
      "This library makes it easy to implement monads with tricky control
-flow. This is useful for: writing web applications in a sequential style,
+flow.  This is useful for: writing web applications in a sequential style,
 programming games with a uniform interface for human and AI players and easy
 replay capababilities, implementing fast parser monads, designing monadic
 DSLs, etc.")
@@ -15129,7 +15129,7 @@ ones.
 
 Accurate information about source positions is available for all block and
 inline elements.  Thus the library can be used to create an accurate syntax
-highlighter or an editor with live preview. The parser has been designed for
+highlighter or an editor with live preview.  The parser has been designed for
 robust performance even in pathological cases that tend to cause stack
 overflows or exponential slowdowns in other parsers, with parsing speed that
 varies linearly with input length.")
@@ -15243,7 +15243,7 @@ platform independent way.")
     (synopsis "Support library for Template Haskell")
     (description
      "This package provides modules containing facilities for manipulating
-Haskell source code using Template Haskell. See
+Haskell source code using Template Haskell.  See
 @uref{http://www.haskell.org/haskellwiki/Template_Haskell} for more
 information.")
     (license license:bsd-3)))