treewide: editorconfig fixes

- remove trailing whitespace
- use spaces for indentation

pkgs/development/tools/misc/doclifter/default.nix

@@ -7,16 +7,16 @@ stdenv.mkDerivation {
     sha256 = "1as6z7mdjrrkw2kism41q5ybvyzvwcmj9qzla2fz98v9f4jbj2s2";
   };
   buildInputs = [ python ];
-  
+
   makeFlags = [ "PREFIX=$(out)" ];
-  
+
   preInstall = ''
     mkdir -p $out/bin
     mkdir -p $out/share/man/man1
     cp manlifter $out/bin
     cp manlifter.1 $out/share/man/man1
   '';
-  
+
   meta = {
     description = "Lift documents in nroff markups to XML-DocBook";
     homepage = "http://www.catb.org/esr/doclifter";