checkdoc: Don't mistake "cf." for sentence end

* lisp/emacs-lisp/checkdoc.el (checkdoc-sentencespace-region-engine):
Recognize "cf." as an abbreviation, not a sentence end.

diff --git a/lisp/emacs-lisp/checkdoc.el b/lisp/emacs-lisp/checkdoc.el
index ccdddb47c3545c9a91bbda2b10d7e55dd57f9ee3..e15836ee7d809b6ef9693323f024a5ab1739fca8 100644 (file)
--- a/lisp/emacs-lisp/checkdoc.el
+++ b/lisp/emacs-lisp/checkdoc.el
@@ -2073,7 +2073,7 @@ If the offending word is in a piece of quoted text, then it is skipped."
                                     ;; piece of an abbreviation
                                     ;; FIXME etc
                                     (looking-at
-                                     "\\([a-zA-Z]\\|[iI]\\.?e\\|[eE]\\.?g\\)\\."))
+                                     "\\([a-zA-Z]\\|[iI]\\.?e\\|[eE]\\.?g\\|[cC]f\\)\\."))
                                 (error t))))
                   (if (checkdoc-autofix-ask-replace
                        b e