treewide: editorconfig fixes

- remove trailing whitespace
- use spaces for indentation

pkgs/tools/filesystems/bcache-tools/default.nix

@@ -48,7 +48,7 @@ stdenv.mkDerivation rec {
       Bcache is a Linux kernel block layer cache. It allows one or more fast
       disk drives such as flash-based solid state drives (SSDs) to act as a
       cache for one or more slower hard disk drives.
-      
+
       This package contains the required user-space tools.
 
       User documentation is in Documentation/bcache.txt in the Linux kernel

pkgs/tools/filesystems/ext4magic/default.nix

@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
 
       If the information in the journal are sufficient, ext4magic can
       recover the most file types, with original filename, owner and group,
-      file mode bits and also the old atime/mtime stamps. 
+      file mode bits and also the old atime/mtime stamps.
 
       It's much more effective and works much better than extundelete.
     '';

pkgs/tools/filesystems/genext2fs/default.nix

@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation {
   name = "genext2fs-1.4.1";
-  
+
   src = fetchurl {
     url = "mirror://sourceforge/genext2fs/genext2fs-1.4.1.tar.gz";
     sha256 = "1z7czvsf3ircvz2cw1cf53yifsq29ljxmj15hbgc79l6gbxbnka0";