Fixed help of Diff and ShowCommands commands jgit.sh <command> --help was not working for the commands Diff and ShowCommands because of missing metaVar information. Missing information is added here. Change-Id: I0ab7e35006b6aa7d4326a634309dddfcdb78f2a6 Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>