tevent: clean up expression

* format with nixpkgs-fmt
* quote homepage as per RFC 0045
* split name → pname & version
* do not use aliases

pkgs/development/libraries/tevent/default.nix

@@ -1,18 +1,34 @@
-{ stdenv, fetchurl, python, pkgconfig, readline, talloc
+{ stdenv
-, libxslt, docbook_xsl, docbook_xml_dtd_42
+, fetchurl
+, python
+, pkg-config
+, readline
+, talloc
+, libxslt
+, docbook-xsl-nons
+, docbook_xml_dtd_42
 }:
 
 stdenv.mkDerivation rec {
-  name = "tevent-0.9.37";
+  pname = "tevent";
+  version = "0.9.37";
 
   src = fetchurl {
-    url = "mirror://samba/tevent/${name}.tar.gz";
+    url = "mirror://samba/tevent/${pname}-${version}.tar.gz";
     sha256 = "1q77vbjic2bb79li2a54ffscnrnwwww55fbpry2kgh7acpnlb0qn";
   };
 
-  nativeBuildInputs = [ pkgconfig ];
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
   buildInputs = [
-    python readline talloc libxslt docbook_xsl docbook_xml_dtd_42
+    python
+    readline
+    talloc
+    libxslt
+    docbook-xsl-nons
+    docbook_xml_dtd_42
   ];
 
   preConfigure = ''
@@ -26,7 +42,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "An event system based on the talloc memory management library";
-    homepage = https://tevent.samba.org/;
+    homepage = "https://tevent.samba.org/";
     license = licenses.lgpl3Plus;
     platforms = platforms.all;
   };