(Memory Full): Mention !MEM FULL! in mode line.

1 files changed, 14 insertions, 12 deletions

diff --git a/man/trouble.texi b/man/trouble.texi
index f9d56d22194..37ced330225 100644
--- a/man/trouble.texi
+++ b/man/trouble.texi
@@ -311,18 +311,20 @@ effect of a @kbd{C-s}, and type @kbd{C-^} to get the effect of a
 @cindex memory full
 @cindex out of memory
 
-  If you get the error message @samp{Virtual memory exceeded}, save your
-modified buffers with @kbd{C-x s}.  This method of saving them has the
-smallest need for additional memory.  Emacs keeps a reserve of memory
-which it makes available when this error happens; that should be enough
-to enable @kbd{C-x s} to complete its work.
-
-  Once you have saved your modified buffers, you can exit this Emacs job
-and start another, or you can use @kbd{M-x kill-some-buffers} to free
-space in the current Emacs job.  If you kill buffers containing a
-substantial amount of text, you can safely go on editing.  Emacs refills
-its memory reserve automatically when it sees sufficient free space
-available, in case you run out of memory another time.
+  If you get the error message @samp{Virtual memory exceeded}, save
+your modified buffers with @kbd{C-x s}.  This method of saving them
+has the smallest need for additional memory.  Emacs keeps a reserve of
+memory which it makes available when this error happens; that should
+be enough to enable @kbd{C-x s} to complete its work.  When the
+reserve has been used, @samp{!MEM FULL!} appears at the beginning of
+the mode line, indicating there is no more reserve.
+
+  Once you have saved your modified buffers, you can exit this Emacs
+session and start another, or you can use @kbd{M-x kill-some-buffers}
+to free space in the current Emacs job.  If this frees up sufficient
+space, Emacs will refill its memory reserve, and @samp{!MEM FULL!}
+will disappear from the mode line.  That means you can safely go on
+editing in the same Emacs session.
 
   Do not use @kbd{M-x buffer-menu} to save or kill buffers when you run
 out of memory, because the buffer menu needs a fair amount of memory