From: Chong Yidong <cyd@stupidchicken.com>
Date: Fri, 27 Feb 2009 15:31:36 +0000 (+0000)
Subject: (keep-lines-read-args): Use empty string as default (Bug#2495).
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(keep-lines-read-args): Use empty string as default (Bug#2495).
---

diff --git a/lisp/replace.el b/lisp/replace.el
index 131bfb66f77..a375c87e74f 100644
--- a/lisp/replace.el
+++ b/lisp/replace.el
@@ -570,7 +570,7 @@ regexp, the last isearch string, and the last replacement regexp."
   "Read arguments for `keep-lines' and friends.
 Prompt for a regexp with PROMPT.
 Value is a list, (REGEXP)."
-  (list (read-regexp prompt) nil nil t))
+  (list (read-regexp prompt "") nil nil t))
 
 (defun keep-lines (regexp &optional rstart rend interactive)
   "Delete all lines except those containing matches for REGEXP.