treewide: editorconfig fixes

- remove trailing whitespace
- use spaces for indentation

pkgs/development/libraries/elf-header/default.nix

@@ -35,9 +35,9 @@ stdenvNoCC.mkDerivation {
     outputsToInstall = [ "out" ];
     description = "The datastructures of ELF according to the target platform's libc";
     longDescription = ''
-	  The Executable and Linkable Format (ELF, formerly named Extensible Linking
-	  Format), is usually defined in a header like this.
-	'';
+      The Executable and Linkable Format (ELF, formerly named Extensible Linking
+      Format), is usually defined in a header like this.
+    '';
     platforms = lib.platforms.all;
     maintainers = [ lib.maintainers.ericson2314 ];
   };