1 files changed, 4 insertions, 0 deletions
diff --git a/etc/NEWS b/etc/NEWS
index fc3ca1ea928..699a04b5246 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1990,6 +1990,10 @@ returns a regexp that never matches anything, which is an identity for
 this operation.  Previously, the empty string was returned in this
 case.
+** New constant 'regexp-unmatchable' contains a never-matching regexp.
+It is a convenient and readable way to specify a regexp that should
+not match anything, and is as fast as any such regexp can be.
 * Changes in Emacs 27.1 on Non-Free Operating Systems

diff --git a/etc/NEWS b/etc/NEWS index fc3ca1ea928..699a04b5246 100644 --- a/etc/NEWS +++ b/etc/NEWS
@@ -1990,6 +1990,10 @@ returns a regexp that never matches anything, which is an identity for
1990	this operation. Previously, the empty string was returned in this	1990	this operation. Previously, the empty string was returned in this
1991	case.	1991	case.
1992		1992
		1993	** New constant 'regexp-unmatchable' contains a never-matching regexp.
		1994	It is a convenient and readable way to specify a regexp that should
		1995	not match anything, and is as fast as any such regexp can be.
		1996
1993		1997
1994	* Changes in Emacs 27.1 on Non-Free Operating Systems	1998	* Changes in Emacs 27.1 on Non-Free Operating Systems
1995		1999