Explore ways to make string interpolation nicer

[blaggacao]

{
    text = ''
      #!${
      if libraries == [ ]
      then "${python}/bin/python"
      else "${python.withPackages (ps libraries)}/bin/python"
    }
    '';
}

the entire ${ ... } block is missing an indent.

[kamadorueda]

I suppose something like this would be better:

• indent as many times as required so that the content is after the opening curly brace
• align the curly braces

{
    text = ''
      #! ${
            if libraries == [ ]
            then "${python}/bin/python"
            else "${python.withPackages (ps libraries)}/bin/python"
          }
    '';
}

[kamadorueda]

Ok so one change so far, is that now string-interpolations (and basically everything) receives feedback from the user. So if the user places it single-line, it's kept single line, otherwise it is expanded to multiline

We are just missing the indentation part proposed in my previous comment

[kamadorueda]

@blaggacao thank you for the report, it now contains the missing indent: #126