Some description fixes

There are many more packages to fix, this is just a start.

Rules:
 * Don't repeat the package name (not always that easy...)
 * Start with capital letter
 * Don't end with full stop
 * Don't start with "The ..." or "A ..."

I've also added descriptions to some packages and rewritten others.

4 files changed, 4 insertions, 3 deletions

diff --git a/pkgs/applications/science/biology/arb/default.nix b/pkgs/applications/science/biology/arb/default.nix
index 1b4563555c46..279091f21bd2 100644
--- a/pkgs/applications/science/biology/arb/default.nix
+++ b/pkgs/applications/science/biology/arb/default.nix
@@ -75,7 +75,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description     = "ARB software for sequence database handling and analysis";
+    description     = "Software for sequence database handling and analysis";
     longDescription = ''The ARB software is a graphically oriented package comprising various tools for sequence database handling and data analysis. A central database of processed (aligned) sequences and any type of additional data linked to the respective sequence entries is structured according to phylogeny or other user defined criteria. Note that this package includes its own older versions of clustal etc.''; 
     license     = "non-free";
     pkgMaintainer = "http://BioLib.open-bio.org/";
diff --git a/pkgs/applications/science/chemistry/avogadro/default.nix b/pkgs/applications/science/chemistry/avogadro/default.nix
index f4b353296fdc..dd6c0eaa3763 100644
--- a/pkgs/applications/science/chemistry/avogadro/default.nix
+++ b/pkgs/applications/science/chemistry/avogadro/default.nix
@@ -15,6 +15,7 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = "-include ${mesa}/include/GL/glu.h";
 
   meta = {
+    description = "Molecule editor and visualizer";
     maintainers = [ stdenv.lib.maintainers.urkud ];
     inherit (qt4.meta) platforms;
   };
diff --git a/pkgs/applications/science/electronics/alliance/default.nix b/pkgs/applications/science/electronics/alliance/default.nix
index 90fd5901cac7..ee22c66dfec0 100644
--- a/pkgs/applications/science/electronics/alliance/default.nix
+++ b/pkgs/applications/science/electronics/alliance/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-      description = "Complete set of free CAD tools and portable libraries for VLSI design.";
+      description = "Complete set of free CAD tools and portable libraries for VLSI design";
       homepage = http://www-asim.lip6.fr/recherche/alliance/;
   };
 }
diff --git a/pkgs/applications/science/math/R/default.nix b/pkgs/applications/science/math/R/default.nix
index 51505d614399..6c8ec9e68c53 100644
--- a/pkgs/applications/science/math/R/default.nix
+++ b/pkgs/applications/science/math/R/default.nix
@@ -59,7 +59,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     homepage = "http://www.r-project.org/";
-    description = "a free software environment for statistical computing and graphics";
+    description = "Free software environment for statistical computing and graphics";
     license = stdenv.lib.licenses.gpl2Plus;
 
     longDescription = ''