emacs-28 1ad4ad0: Document the t value for set-process-filter in the manual

[Lars Ingebrigtsen]

branch: emacs-28
commit 1ad4ad0c11ce6e1f4663f611334792aec86308f1
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Document the t value for set-process-filter in the manual
    
    * doc/lispref/processes.texi (Filter Functions): Mention what t
    means (bug#51177).
---
 doc/lispref/processes.texi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/doc/lispref/processes.texi b/doc/lispref/processes.texi
index d90097d..0aa7b39 100644
--- a/doc/lispref/processes.texi
+++ b/doc/lispref/processes.texi
@@ -1779,9 +1779,11 @@ or more batches of output; one way to do this is to 
insert the
 received text into a temporary buffer, which can then be searched.
 
 @defun set-process-filter process filter
-This function gives @var{process} the filter function @var{filter}.  If
-@var{filter} is @code{nil}, it gives the process the default filter,
-which inserts the process output into the process buffer.
+This function gives @var{process} the filter function @var{filter}.
+If @var{filter} is @code{nil}, it gives the process the default
+filter, which inserts the process output into the process buffer.  If
+@var{filter} is @code{t}, Emacs stops accepting output from the
+process.
 @end defun
 
 @defun process-filter process