--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties	Wed Jan 09 16:41:16 2019 -0400
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties	Fri Jan 11 11:32:00 2019 -0800
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -44,7 +44,7 @@
 javac.opt.sourcepath=\
     Specify where to find input source files
 javac.opt.m=\
-    Compile only the specified module, check timestamps
+    Compile only the specified module(s), check timestamps
 javac.opt.modulesourcepath=\
     Specify where to find input source files for multiple modules
 javac.opt.bootclasspath=\
@@ -108,7 +108,7 @@
 javac.opt.arg.mspath=\
     <module-source-path>
 javac.opt.arg.m=\
-    <module-name>
+    <module>(,<module>)*
 javac.opt.arg.jdk=\
     <jdk>|none
 javac.opt.arg.dirs=\