[Integrated] RFR: skara: add hint about help for commands

[Erik Helin]

Changeset: 341fcfee
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-04-23 10:18:16 +0000
URL:       https://git.openjdk.java.net/skara/commit/341fcfee

skara: add hint about help for commands

Reviewed-by: rwestberg

! cli/src/main/java/org/openjdk/skara/cli/GitSkara.java