[Emacs-diffs] emacs-26 5d744e0 1/3: Don't replace user input when completion prefix is empty (Bug#18951)

[Noam Postavsky]

branch: emacs-26
commit 5d744e032fee9ce60446a3cc0cf7c2e681ace465
Author: Noam Postavsky <address@hidden>
Commit: Noam Postavsky <address@hidden>

    Don't replace user input when completion prefix is empty (Bug#18951)
    
    * lisp/pcomplete.el (pcomplete-parse-arguments): Only replace user
    input if we produced a non-empty common completion stub.
---
 lisp/pcomplete.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/pcomplete.el b/lisp/pcomplete.el
index 745a813..2d2a877 100644
--- a/lisp/pcomplete.el
+++ b/lisp/pcomplete.el
@@ -772,7 +772,7 @@ this is `comint-dynamic-complete-functions'."
                (setq c (cdr c)))
              (setq pcomplete-stub (substring common-stub 0 len)
                    pcomplete-autolist t)
-             (when (and begin (not pcomplete-show-list))
+             (when (and begin (> len 0) (not pcomplete-show-list))
                (delete-region begin (point))
                (pcomplete-insert-entry "" pcomplete-stub))
              (throw 'pcomplete-completions completions))