Rename and document --predict-overwrite.

man/mosh-client.1

@@ -72,6 +72,11 @@ See
 Controls local echo as described in
 .BR mosh (1).
 
+.TP
+.B MOSH_PREDICTION_OVERWRITE
+Controls local echo insert/overwrite as described in
+.BR mosh (1).
+
 .TP
 .B MOSH_TITLE_NOPREFIX
 See

man/mosh.1

@@ -142,6 +142,18 @@ Synonym for \-\-predict=always
 .B \-n
 Synonym for \-\-predict=never
 
+.TP
+.B \-\-predict\-overwrite\fP
+When prediction is enabled, do not insert speculative local echo
+before existing text, but overwrite it instead.
+
+The MOSH_PREDICTION_OVERWRITE environment variable also enables this
+if its value is 'yes'.
+
+.TP
+.B \-o
+Synonym for \-\-predict\-overwrite
+
 .TP
 .B \-\-family=inet
 Only use IPv4 for the SSH connection and Mosh session.

scripts/mosh.pl

@@ -99,7 +99,7 @@ qq{Usage: $0 [options] [--] [user@]host [command...]
 -n      --predict=never         never use local echo
         --predict=experimental  aggressively echo even when incorrect
 
--o      --overwrite             prediction overwrites instead of inserting
+-o      --predict-overwrite     prediction overwrites instead of inserting
 
 -4      --family=inet        use IPv4 only
 -6      --family=inet6       use IPv6 only
@@ -154,7 +154,7 @@ sub predict_check {
 GetOptions( 'client=s' => \$client,
 	    'server=s' => \$server,
 	    'predict=s' => \$predict,
-	    'overwrite|o!' => \$overwrite,
+	    'predict-overwrite|o!' => \$overwrite,
 	    'port=s' => \$port_request,
 	    'a' => sub { $predict = 'always' },
 	    'n' => sub { $predict = 'never' },