diff -r 3739e9a5b6b5 -r 5f63af8f9d7f src/jdk.jshell/share/classes/jdk/internal/jshell/tool/resources/l10n.properties
--- a/src/jdk.jshell/share/classes/jdk/internal/jshell/tool/resources/l10n.properties	Mon Apr 23 17:45:05 2018 +0200
+++ b/src/jdk.jshell/share/classes/jdk/internal/jshell/tool/resources/l10n.properties	Mon Apr 23 09:01:03 2018 -0700
@@ -205,6 +205,7 @@
 \    --add-modules <module>(,<module>)*\n\
 \                          Specify modules to resolve, or all modules on the\n\
 \                            module path if <module> is ALL-MODULE-PATHs\n\
+\    --enable-preview      Allow code to depend on preview features of this release\n\
 \    --startup <file>      One run replacement for the startup definitions\n\
 \    --no-startup          Do not run the startup definitions\n\
 \    --feedback <mode>     Specify the initial feedback mode. The mode may be\n\