(checkdoc-sentencespace-region-engine): Protect a `forward-sexp' call

which could fail, and improved regex for ie, and eg abbreviations.

1 files changed, 7 insertions, 4 deletions

diff --git a/lisp/emacs-lisp/checkdoc.el b/lisp/emacs-lisp/checkdoc.el
index 3d4e5957c38..5fd428a904a 100644
--- a/lisp/emacs-lisp/checkdoc.el
+++ b/lisp/emacs-lisp/checkdoc.el
@@ -2026,10 +2026,13 @@ If the offending word is in a piece of quoted text, then it is skipped."
                              (not (checkdoc-in-example-string-p begin end))
                              (not (save-excursion
                                     (goto-char (match-beginning 1))
-                                    (forward-sexp -1)
-                                    ;; piece of an abbreviation
-                                    (looking-at "\\([a-z]\\|[ie]\\.?g\\)\\.")
-                                    )))
+                                    (condition-case nil
+                                        (progn
+                                          (forward-sexp -1)
+                                          ;; piece of an abbreviation
+                                          (looking-at
+                                           "\\([a-z]\\|[iI]\\.?e\\|[eE]\\.?g\\)\\."))
+                                      (error t)))))
                         (if (checkdoc-autofix-ask-replace
                              b e
                              "There should be two spaces after a period.  Fix? "