clojure-fill-paragraph won't break lines at the space in `word :word`

[oskarkv]

I noticed a, to me, weird behavior of clojure-fill-paragraph. I was listing keyword arguments in a docstrsing, and when I tried to fill it I ended up with something similar to the screenshot below. I tracked it down to the extra stuff that it is adding to paragraph-start, i.e. this code:

(let ((paragraph-start
       (concat paragraph-start
               "\\|\\s-*\\([(:\"[]\\|~@\\|`(\\|#'(\\)"))

I don't understand why the regexp is like that, but I don't like the current result.

Expected behavior

clojure-fill-paragraph can break lines at the space in word :word.

Actual behavior

Steps to reproduce the problem

Try to fill the docstring in

(defn some-function
  "word word word word word word word word word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word :word word word word word word word word word word word word word word word word word word word word word word word word"
[])

Environment & Version information

clojure-mode version 5.13