gnu: Tweak a few synopses and descriptions reported by 'lint'.

* gnu/packages/haskell.scm (ghc-text)[synopsis]: Remove period.
  [description]: Two space after end-of-sentence periods.
  (ghc-http)[description]: Likewise.
* gnu/packages/image.scm (libwebp)[description]: Likewise.
* gnu/packages/libedit.scm (libedit)[description]: Likewise.
* gnu/packages/kde.scm (oxygen-icons)[synopsis]: Capitalize.

gnu/packages/haskell.scm

@@ -373,14 +373,13 @@ access to the full zlib feature set.")
     (arguments
      `(#:tests? #f)) ; FIXME: currently missing libraries used for tests.
     (home-page "https://github.com/bos/text")
-    (synopsis
+    (synopsis "Efficient packed Unicode text type library")
-     "Efficient packed Unicode text type library.")
     (description
      "An efficient packed, immutable Unicode text type (both strict and
 lazy), with a powerful loop fusion optimization framework.
 
 The 'Text' type represents Unicode character strings, in a time and
-space-efficient manner. This package provides text processing
+space-efficient manner.  This package provides text processing
 capabilities that are optimized for performance critical use, both
 in terms of large data quantities and high speed.")
     (license bsd-3)))
@@ -870,7 +869,7 @@ package into this package.")
     (home-page "https://github.com/haskell/HTTP")
     (synopsis "Library for client-side HTTP")
     (description
-     "The HTTP package supports client-side web programming in Haskell. It
+     "The HTTP package supports client-side web programming in Haskell.  It
 lets you set up HTTP connections, transmitting requests and processing the
 responses coming back.")
     (license bsd-3)))

gnu/packages/image.scm

@@ -555,10 +555,10 @@ multi-dimensional image processing.")
     (synopsis "Lossless and lossy image compression")
     (description
      "WebP is a new image format that provides lossless and lossy compression
-for images. WebP lossless images are 26% smaller in size compared to
+for images.  WebP lossless images are 26% smaller in size compared to
-PNGs. WebP lossy images are 25-34% smaller in size compared to JPEG images at
+PNGs.  WebP lossy images are 25-34% smaller in size compared to JPEG images at
-equivalent SSIM index. WebP supports lossless transparency (also known as
+equivalent SSIM index.  WebP supports lossless transparency (also known as
-alpha channel) with just 22% additional bytes. Transparency is also supported
+alpha channel) with just 22% additional bytes.  Transparency is also supported
 with lossy compression and typically provides 3x smaller file sizes compared
 to PNG when lossy compression is acceptable for the red/green/blue color
 channels.")

gnu/packages/kde.scm

@@ -224,6 +224,6 @@ calculation of sha1 for every file crawled
     (arguments
      `(#:tests? #f)) ; no test target
     (home-page "http://www.kde.org/")
-    (synopsis "oxygen icon theme for the KDE desktop")
+    (synopsis "Oxygen icon theme for the KDE desktop")
     (description "KDE desktop environment")
     (license lgpl3+)))

gnu/packages/libedit.scm

@@ -42,7 +42,7 @@
     (synopsis "NetBSD Editline library")
     (description
      "This is an autotool- and libtoolized port of the NetBSD Editline
-library (libedit). This Berkeley-style licensed command line editor library
+library (libedit).  This Berkeley-style licensed command line editor library
 provides generic line editing, history, and tokenization functions, similar to
 those found in GNU Readline.")
     (license bsd-3)))