Keep interactive uses of 'recenter' backward compatible (Bug#31325)

* window.c (Frecenter): Change the interactive spec to always pass
a non-nil value to the REDISPLAY argument when called interactively.
* window.el (recenter-top-bottom): Make sure 'recenter's second
argument is non-nil everywhere.
* windows.texi (Textual Scrolling): Update documentation of
'recenter'.

1 files changed, 2 insertions, 1 deletions

diff --git a/doc/lispref/windows.texi b/doc/lispref/windows.texi
index ae6837b444f..3eaa15a6036 100644
--- a/doc/lispref/windows.texi
+++ b/doc/lispref/windows.texi
@@ -4156,7 +4156,8 @@ window.  If @var{count} is @code{nil} and @var{redisplay} is
 non-@code{nil}, this function may redraw the frame, according to the
 value of @code{recenter-redisplay}.  Thus, omitting the second
 argument can be used to countermand the effect of
-@code{recenter-redisplay} being non-@code{nil}.
+@code{recenter-redisplay} being non-@code{nil}.  Interactive calls
+pass non-‘nil’ for @var{redisplay}.
 
 When @code{recenter} is called interactively, @var{count} is the raw
 prefix argument.  Thus, typing @kbd{C-u} as the prefix sets the