group-expression
Specifies the group or groups to be deleted. A group expression
can be one or more group names, a wildcard expression, or a list
of these separated by commas.
remark
Specifies a character string to be logged in the history file
with this command, usually used to explain why the command was
entered. The remark is enclosed in quotation marks. If no remark
was entered, a null remark ("") is logged.