I think this is good, but would like @zygoloid to confirm that this isn't undoing some of the "deliberate diversity of core style".

I certainly hope that random full-codeblock indentation isn't part of the "core diversity".

If you wish to keep the indentation in the LaTeX source code but have it removed in the PDF output, you can add gobble=n to \lstset (where n is the number of characters to outdent the code block).

Thanks, @godbyk. Though I doubt we want to allow inconsistent codeblock indentation across the LaTeX source to start with.