treewide: editorconfig fixes

- remove trailing whitespace
- use spaces for indentation

pkgs/development/tools/yuicompressor/default.nix

@@ -3,7 +3,7 @@
 stdenv.mkDerivation rec {
   pname = "yuicompressor";
   version = "2.4.8";
-  
+
   src = fetchurl {
     url = "https://github.com/yui/yuicompressor/releases/download/v${version}/${pname}-${version}.jar";
     sha256 = "1qjxlak9hbl9zd3dl5ks0w4zx5z64wjsbk7ic73r1r45fasisdrh";
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     makeWrapper ${jre}/bin/java $out/bin/yuicompressor --add-flags \
      "-cp $out/lib/yuicompressor.jar com.yahoo.platform.yui.compressor.YUICompressor"
   '';
-  
+
   meta = with lib; {
     description = "A JavaScript and CSS minifier";
     homepage = "http://yui.github.io/yuicompressor/";