treewide: remove periods from end of package descriptions

pkgs/tools/system/incron/default.nix

@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
   '';
 
   meta = with stdenv.lib; {
-    description = "A cron-like daemon which handles filesystem events.";
+    description = "A cron-like daemon which handles filesystem events";
     homepage = "https://github.com/ar-/incron";
     license = licenses.gpl2;
     maintainers = [ maintainers.aanderse ];

pkgs/tools/system/jump/default.nix

@@ -28,7 +28,7 @@ buildGoModule rec {
   '';
 
   meta = with lib; {
-    description = "Jump helps you navigate faster by learning your habits.";
+    description = "Jump helps you navigate faster by learning your habits";
     longDescription = ''
       Jump integrates with the shell and learns about your
       navigational habits by keeping track of the directories you visit. It

pkgs/tools/system/pcstat/default.nix

@@ -16,7 +16,7 @@ buildGoPackage {
   goDeps = ./deps.nix;
 
   meta = with stdenv.lib; {
-    description = "Page Cache stat: get page cache stats for files on Linux.";
+    description = "Page Cache stat: get page cache stats for files on Linux";
     homepage = "https://github.com/tobert/pcstat";
     license = licenses.asl20;
     maintainers = with maintainers; [ aminechikhaoui ];