I’m erring on the side of commit and git ‘er done by merging this PR today, adding a small bit of text to the style guide. The following paste from the web discards leading spaces, apologies:
***
In addition, every pair of expressions on a line should have at least one
space between the two, even if they’re separated by parentheses.
@compare[
@racketmod[#:file
@tt{good}
racket
(define (f x g)
[(< x 3) (g (g 3))])
]
@filebox[@tt{bad}
@codeblock{#lang racket
(define(f x g)
[(< x 3)(g(g 3))])
}]
]
***
https://github.com/racket/racket/pull/3049