Don't use "with licenses;" for single licences

And don't use square brackets on such lines.

pkgs/data/documentation/zeal/default.nix

@@ -30,7 +30,7 @@ stdenv.mkDerivation rec {
       app), available for Linux and Windows.
     '';
     homepage = "http://zealdocs.org/";
-    license = with stdenv.lib.licenses; [ gpl3 ];
+    license = stdenv.lib.licenses.gpl3;
     platforms = stdenv.lib.platforms.linux;
     maintainers = with stdenv.lib.maintainers; [ skeidel ];
   };

pkgs/data/fonts/terminus-font/default.nix

@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
       EGA/VGA-bold for 8x14 and 8x16.
     '';
     homepage = http://www.is-vn.bg/hamster/;
-    license = with licenses; [ gpl2Plus ];
+    license = licenses.gpl2Plus;
     maintainers = with maintainers; [ astsmtl ];
     platforms = with platforms; linux;
   };

pkgs/data/misc/geolite-legacy/default.nix

@@ -30,7 +30,7 @@ stdenv.mkDerivation {
     inherit version;
     description = "GeoLite Legacy IP geolocation databases";
     homepage = https://geolite.maxmind.com/download/geoip;
-    license = with licenses; cc-by-sa-30;
+    license = licenses.cc-by-sa-30;
     platforms = with platforms; linux;
     maintainers = with maintainers; [ nckx ];
   };

pkgs/data/misc/media-player-info/default.nix

@@ -26,7 +26,7 @@ in
     meta = with stdenv.lib; {
       description = "A repository of data files describing media player capabilities";
       homepage = "http://www.freedesktop.org/wiki/Software/media-player-info/";
-      license = with licenses; [ bsd3 ];
+      license = licenses.bsd3;
       maintainer = with maintainers; [ ttuegel ];
     };
   }