message: Minor cli help fix
diff: @@ -1230,7 +1230,7 @@ pub mod auth_rule_command {
  .add_required_param("constraint", r#"Set of constraints required for execution of an action
  {
  constraint_id - type of a constraint. Can be either "ROLE" to specify final constraint or "AND"/"OR" to combine constraints.
  - role - role associated value of a user which have to satisfy to constrain {TRUSTEE: 0, STEWARD: 2, TRUST_ANCHOR: 101, NETWORK_MONITOR: 201, ANY: *}.
  + role - role associated value {TRUSTEE: 0, STEWARD: 2, TRUST_ANCHOR: 101, NETWORK_MONITOR: 201, ANY: *}.
  sig_count - the number of signatures required to execution action.
  need_to_be_owner - if user must be an owner of transaction.
  metadata - additional parameters of the constraint.
  @@ -1241,8 +1241,8 @@ pub mod auth_rule_command {
  auth_constraints: [<constraint_1>, <constraint_2>]
  }
  "#)
  - .add_example(r#"ledger auth-rule txn_type=NYM action=ADD field=role new_value=101 constraint={"sig_count":1,"role":"0","constraint_id":"ROLE","need_to_be_owner":false}"#)
  - .add_example(r#"ledger auth-rule txn_type=NYM action=EDIT field=role old_value=101 new_value=0 constraint={"sig_count":1,"role":"0","constraint_id":"ROLE","need_to_be_owner":false}"#)
  + .add_example(r#"ledger auth-rule txn_type=NYM action=ADD field=role new_value=101 constraint="{"sig_count":1,"role":"0","constraint_id":"ROLE","need_to_be_owner":false}""#)
  + .add_example(r#"ledger auth-rule txn_type=NYM action=EDIT field=role old_value=101 new_value=0 constraint="{"sig_count":1,"role":"0","constraint_id":"ROLE","need_to_be_owner":false}""#)
  .finalize()
  );
  