Emit empty lines without trailing whitespace

[wolfgangwalther]

Currently, empty lines in an intended code block are padded with the same indentation as the remaining code block. However, this triggers editorconfig-checker errors for "new trailing whitespace".

It would be great if these whitespace could not be emitted. Since the editorconfig-checker doesn't support auto-fixing, I now need to manually fix the offending files after running mdcr. (I am currently running a treewide nixfmt run after it became 1.0 recently)

[drupol]

Hello again,

Can you show me a practical example of what you're suggesting here?

[wolfgangwalther]

After reformatting CONTRIBUTING.md in nixpkgs, one snippet looks like this:

  ```nix
  {
    stdenv,
    doCoverageAnalysis ? false,
    ...
  }@args:
  
  stdenv.mkDerivation (
    args
    // {
      foo = if doCoverageAnalysis then "bla" else "";
    }
  )
  ```

editor-config-checker complains with:

CONTRIBUTING.md:
	604: Trailing whitespace

The diff I need to apply to fix it:

   ```nix
   {
     stdenv,
     doCoverageAnalysis ? false,
     ...
   }@args:
-  
+
   stdenv.mkDerivation (
     args
     // {
       foo = if doCoverageAnalysis then "bla" else "";
     }
   )
  ```

[drupol]

Ooh I see. This one will be a bit difficult to fix within this project, but I will give it a look.