jo: 1.1 -> 1.2

The "src.rev" was changed because upstream tag does not have the "v"
prefix for this version.

A little bit of code formatting was done as well.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

pkgs/development/tools/jo/default.nix

@@ -1,15 +1,14 @@
 {stdenv, fetchFromGitHub, autoreconfHook}:
 
 stdenv.mkDerivation rec {
-  name = "jo-${version}";
-  version = "1.1";
+  pname = "jo";
+  version = "1.2";
 
   src = fetchFromGitHub {
-    owner = "jpmens";
+    owner  = "jpmens";
     repo = "jo";
-
-    rev = "v${version}";
-    sha256="1gn9fa37mfb85dfjznyfgciibf142kp0gisc2l2pnz0zrakbvvy3";
+    rev = version;
+    sha256 ="03b22zb5034ccqyp4ynfzknxagb3jz2dppl0kqz2nv4a08aglpmy";
   };
 
   enableParallelBuilding = true;