Missing whitespace indent in module command help message

ARGUMENTS

--module-root-dir - (optional) The absolute file path to the server's modules 
                    directory. By default the module is added to (or removed from)
                    JBOSS_HOME/modules
 
--name          - (required) the name of the module to be added or removed.
                   NOTE: slot is not a part of the module name.

 --slot          - (optional) specifies a slot which should be created or
                   removed. If this argument is not specified, "main" slot is
                   assumed.
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