Configuration option to always hang guards/where

Apologies if this already exists, but I wasn't able to find anything obvious in the docs or code to force guards and where clauses to always be hung on the next line. For example, I'd like code to be formatted as follows:

foo = blah
  where
    intersectBM (Bin p2 m2 l2 r2)
      | nomatch p2 m2 = Nil

Currently after formatting it will look like:

foo = blah where intersectBM (Bin p2 m2 l2 r2) | nomatch p2 m2 = Nil

It appears that if all the guards/where clauses fit without overflowing the column limit then they are aligned on the right. Thanks!

Start by reading the formatter's handling of guards and where clauses, along with its configuration documentation and code. Trace why clauses remain inline when they fit within the column limit. Done means a configuration option forces these clauses onto the next line and the reported example formats as shown.