bug#39778: [PATCH] checkdoc: Don't mistake "cf." for sentence end

["Štěpán Němec" <stepnem@gmail.com>]

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"Cf." is a common abbreviation in documentation.

Currently checkdoc warns about lack of double space after "cf." or
"Cf.". The attached patch adds an exception similar to the already
handled "eg." and and "ie.".

-- 
Štěpán


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From bb705cf2425537b91dd39d24689bb2dbb378f73d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=A0t=C4=9Bp=C3=A1n=20N=C4=9Bmec?= <stepnem@gmail.com>
Date: Thu, 29 Aug 2019 19:42:21 +0200
Subject: [PATCH] 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.
---
 lisp/emacs-lisp/checkdoc.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/emacs-lisp/checkdoc.el b/lisp/emacs-lisp/checkdoc.el
index ccdddb47c3..e15836ee7d 100644
--- a/lisp/emacs-lisp/checkdoc.el
+++ b/lisp/emacs-lisp/checkdoc.el
@@ -2073,7 +2073,7 @@ checkdoc-sentencespace-region-engine
                                     ;; 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
-- 
2.25.1