Merge from origin/emacs-27

a2b07f9f11 (origin/emacs-27) ; * etc/NEWS: Explain how to get back ol...
b468b3d1ff Fix a recent documentation change
1ab766fd58 Fix last change
ecfe633993 * lisp/tab-bar.el: Last-minute changes.
c1ce9fa7f2 * lisp/subr.el (cancel-change-group): Fix bug#39680
ef5744a988 Improve docs for horizontal scrolling with mouse and touch...
1bc3fa0bd0 * lisp/emacs-lisp/package.el (package-install): Fix typo i...
4537976afd Port .gdbinit to clang with -gdwarf-4
0883c800a0 Simplify rx example in manual
a695189248 ; * etc/NEWS: Fix typo.

# Conflicts:
#	etc/NEWS

2 files changed, 11 insertions, 6 deletions

diff --git a/doc/emacs/frames.texi b/doc/emacs/frames.texi
index 002297c2599..7a583b96bbd 100644
--- a/doc/emacs/frames.texi
+++ b/doc/emacs/frames.texi
@@ -217,10 +217,15 @@ default bound to scrolling with the @key{Ctrl} modifier.
 @vindex mouse-wheel-tilt-scroll
 @vindex mouse-wheel-flip-direction
 Emacs can also support horizontal scrolling if your mouse's wheel can
-be tilted.  This feature is off by default; the variable
-@code{mouse-wheel-tilt-scroll} turns it on.  If you'd like to reverse
-the direction of horizontal scrolling, customize the variable
-@code{mouse-wheel-flip-direction} to a non-@code{nil} value.
+be tilted, or if your touchpad supports it.  This feature is off by
+default; the variable @code{mouse-wheel-tilt-scroll} turns it on, if
+you customize it to a non-@code{nil} value.  By default, tilting the
+mouse wheel scrolls the window's view horizontally in the direction of
+the tilt: e.g., tilting to the right scrolls the window to the right,
+so that the text displayed in the window moves horizontally to the
+left.  If you'd like to reverse the direction of horizontal scrolling,
+customize the variable @code{mouse-wheel-flip-direction} to a
+non-@code{nil} value.
 
 When the mouse pointer is over an image, scrolling the mouse wheel
 with the @key{Ctrl} modifier scales the image under the mouse pointer.
diff --git a/doc/lispref/searching.texi b/doc/lispref/searching.texi
index 1a090ebe101..83c154938cd 100644
--- a/doc/lispref/searching.texi
+++ b/doc/lispref/searching.texi
@@ -1021,8 +1021,8 @@ or, using shorter synonyms and written more compactly,
 @example
 @group
 (rx "/*"
-    (* (| (not (any "*"))
-          (: "*" (not (any "/")))))
+    (* (| (not "*")
+          (: "*" (not "/"))))
     (+ "*") "/")
 @end group
 @end example