treewide: editorconfig fixes

- remove trailing whitespace
- use spaces for indentation

pkgs/applications/window-managers/jwm/jwm-settings-manager.nix

@@ -3,7 +3,7 @@
 stdenv.mkDerivation {
   pname = "jwm-settings-manager";
   version = "2018-10-19";
-  
+
   src = fetchFromGitHub {
     owner = "Israel-D";
     repo = "jwm-settings-manager";

pkgs/applications/window-managers/lemonbar/default.nix

@@ -2,21 +2,21 @@
 
 stdenv.mkDerivation {
   name = "lemonbar-1.4";
-  
+
   src = fetchurl {
     url    = "https://github.com/LemonBoy/bar/archive/v1.4.tar.gz";
     sha256 = "0fa91vb968zh6fyg97kdaix7irvqjqhpsb6ks0ggcl59lkbkdzbv";
   };
-  
+
   buildInputs = [ libxcb perl ];
-  
+
   prePatch = ''sed -i "s@/usr@$out@" Makefile'';
-  
+
   meta = with lib; {
     description = "A lightweight xcb based bar";
     homepage = "https://github.com/LemonBoy/bar";
     maintainers = [ maintainers.meisternu ];
-    license = "Custom";   
+    license = "Custom";
     platforms = platforms.linux;
   };
 }

pkgs/applications/window-managers/vwm/default.nix

@@ -3,7 +3,7 @@ libvterm}:
 
 stdenv.mkDerivation rec {
   name = "vwm-2.1.3";
- 
+
   src = fetchurl {
     url = "mirror://sourceforge/vwm/${name}.tar.gz";
     sha256 = "1r5wiqyfqwnyx7dfihixlnavbvg8rni36i4gq169aisjcg7laxaf";
@@ -19,10 +19,10 @@ stdenv.mkDerivation rec {
   preInstall = ''
     mkdir -p $out/bin $out/include
   '';
- 
+
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ ncurses glib libviper libpseudo gpm libvterm ];
- 
+
   meta = with lib; {
     homepage = "http://vwm.sourceforge.net/";
     description = "Dynamic window manager for the console";