From 00832e01226df95a58a4fb29bc3f873fc6a6c9d5 Mon Sep 17 00:00:00 2001
From: Jay Belanger <jay.p.belanger@gmail.com>
Date: Mon, 2 Nov 2009 02:56:43 +0000
Subject: [PATCH] (calc-date-notation): Check to see if the format is
 whitespace instead of only the empty string.

---
 lisp/calc/calc-forms.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/calc/calc-forms.el b/lisp/calc/calc-forms.el
index 99a8b949c42..0845fb151ab 100644
--- a/lisp/calc/calc-forms.el
+++ b/lisp/calc/calc-forms.el
@@ -81,7 +81,7 @@
 (defun calc-date-notation (fmt arg)
   (interactive "sDate format (e.g., M/D/YY h:mm:ss): \nP")
   (calc-wrapper
-   (if (equal fmt "")
+   (if (string-match-p "\\`\\s-*\\'" fmt)
        (setq fmt "1"))
    (if (string-match "\\` *[0-9] *\\'" fmt)
        (setq fmt (nth (string-to-number fmt) calc-standard-date-formats)))
-- 
2.30.2