shortdoc: Don't burp on missing docstrings

* lisp/emacs-lisp/shortdoc.el (shortdoc--display-function): Report missing docstrings more cleanly than "Wrong type argument: stringp, nil".
2026-02-04 10:59:23 -05:00
parent 1396b373ff
commit f73cb8fba2
1 changed files with 3 additions and 1 deletions
--- a/lisp/emacs-lisp/shortdoc.el
+++ b/lisp/emacs-lisp/shortdoc.el
@@ -1707,7 +1707,9 @@ function's documentation in the Info manual"))
    ;; Doc string.
    (insert "  "
            (or (plist-get data :doc)
-                (car (split-string (documentation function) "\n"))))
+                (car (split-string (or (documentation function)
+                                       "Error: missing docstring.")
+                                   "\n"))))
    (insert "\n")
    (add-face-text-property start-section (point) 'shortdoc-section t)
    (let ((print-escape-newlines t)