   (format ":[^ ]* \\([^ ]+\\)\\(%s\\)*" fuel-syntax--stack-effect-regex))
 
 (defconst fuel-syntax--defun-signature-regex
-  (format "\\(%s\\|%s\\)" fuel-syntax--word-signature-regex "M[^:]*: [^ ]+ [^ ]+"))
+  (format "\\(%s\\|%s\\)"
+          fuel-syntax--word-signature-regex
+          "M[^:]*: [^ ]+ [^ ]+"))
 
 (defconst fuel-syntax--constructor-decl-regex
   "\\_<C: +\\(\\w+\\) +\\(\\w+\\)\\( .*\\)?$")

                                           "C-ENUM" "C-STRUCT" "C-UNION"
                                           "FROM" "FUNCTION:"
                                           "INTERSECTION:"
                                           "M" "MACRO" "MACRO:"
                                           "MEMO" "MEMO:" "METHOD"
                                           "SYNTAX"
                                           "PREDICATE" "PRIMITIVE"

    "HELP:" "HEX:" "HOOK:"
    "IN:" "initial:" "INSTANCE:" "INTERSECTION:"
    "LIBRARY:"
    "M:" "M::" "MACRO:" "MACRO::" "MAIN:" "MATH:"
    "MEMO:" "MEMO:" "METHOD:" "MIXIN:"
    "OCT:"
    "POSTPONE:" "PREDICATE:" "PRIMITIVE:" "PRIVATE>" "PROVIDE:"
    "QUALIFIED-WITH:" "QUALIFIED:"
