Merge from origin/emacs-26

3abebeb * lisp/files.el (cd): Fix last change.  (Bug#33791)
7a60a4f Fix remote directories in Eshell on MS-Windows
822a2d0 Fix :type 'group' in defcustom
a731c56 Fix NS fringe bitmap drawing bug (bug#33864)
0c52459 Fix commentary in dispnew.c
c9fdd1b Improve accept-process-process doc
9578c2a Fix a simple bug in display-buffer-use-some-frame
0f9be72 Clarify thread switching while waiting for process output
24ddea0 Improve process doc. with respect to handling of large input ...
2931016 ; Cosmetic changes in etc/NEWS
85516b8 Minor copyedits in landmark.el

# Conflicts:
#	etc/NEWS

2 files changed, 11 insertions, 9 deletions

diff --git a/doc/lispref/processes.texi b/doc/lispref/processes.texi
index c6ffb2815e0..88b0382b7d1 100644
--- a/doc/lispref/processes.texi
+++ b/doc/lispref/processes.texi
@@ -612,10 +612,9 @@ these features.  However, for subprocesses used by Lisp programs for
 internal purposes (i.e., no user interaction with the subprocess is
 required), where significant amounts of data need to be exchanged
 between the subprocess and the Lisp program, it is often better to use
-a pipe, because pipes are more efficient, and because they are immune
-to stray character injections that ptys introduce for large (around
-500 byte) messages.  Also, the total number of ptys is limited on many
-systems, and it is good not to waste them unnecessarily.
+a pipe, because pipes are more efficient.  Also, the total number of
+ptys is limited on many systems, and it is good not to waste them
+unnecessarily.
 
 @defun make-process &rest args
 This function is the basic low-level primitive for starting
@@ -1821,7 +1820,8 @@ until output arrives from a process.
 This function allows Emacs to read pending output from processes.  The
 output is given to their filter functions.  If @var{process} is
 non-@code{nil} then this function does not return until some output
-has been received from @var{process}.
+has been received from @var{process} or @var{process} has closed the
+connection.
 
 The arguments @var{seconds} and @var{millisec} let you specify timeout
 periods.  The former specifies a period measured in seconds and the
@@ -1846,7 +1846,9 @@ speech synthesis.
 
 The function @code{accept-process-output} returns non-@code{nil} if it
 got output from @var{process}, or from any process if @var{process} is
-@code{nil}.  It returns @code{nil} if the timeout expired before output
+@code{nil}; this can occur even after a process has exited if the
+corresponding connection contains buffered data.  The function returns
+@code{nil} if the timeout expired or the connection was closed before output
 arrived.
 @end defun
 
diff --git a/doc/lispref/threads.texi b/doc/lispref/threads.texi
index c9d5f790485..d5d3b4243a6 100644
--- a/doc/lispref/threads.texi
+++ b/doc/lispref/threads.texi
@@ -17,9 +17,9 @@ correct programs should not rely on cooperative threading.
 
   Currently, thread switching will occur upon explicit request via
 @code{thread-yield}, when waiting for keyboard input or for process
-output (e.g., during @code{accept-process-output}), or during blocking
-operations relating to threads, such as mutex locking or
-@code{thread-join}.
+output from asynchronous processes (e.g., during
+@code{accept-process-output}), or during blocking operations relating
+to threads, such as mutex locking or @code{thread-join}.
 
   Emacs Lisp provides primitives to create and control threads, and
 also to create and control mutexes and condition variables, useful for