Cleaning up the concise message:

- using 2 spaces instead of 4,
- rewording the "for more use --help" part of the message as suggested to avoid the word "launcher".

src/java.base/share/classes/sun/launcher/resources/launcher.properties

@@ -241,10 +241,10 @@ java.launcher.opt.concise.header  =   Usage: java [java options...] <application
 \  <sourcefile>.java          to compile and execute a source-file program\n\n\
 \Where key java options include:\n\
 \  --class-path <class path>\n\
-\      a "{0}"-separated list of directories and JAR archives to search for class files\n\
+\    a "{0}"-separated list of directories and JAR archives to search for class files\n\
 \  --module-path <module path>\n\
-\      a "{0}"-separated list of directories and JAR archives to search for modules\n\n\
-\For more details about this launcher:   java --help\n\
+\    a "{0}"-separated list of directories and JAR archives to search for modules\n\n\
+\For additional help on usage:           java --help\n\
 \For an interactive Java environment:    jshell
 
 java.launcher.bad.option=\