class RuboCop::Cop::Style::ClassVars

reduced the number of offenses that would be reported.
are signaled only on assignment to class variables to
This cop checks for uses of class variables. Offenses

def message(node) 

def message(node)
  class_var, = *node
  format(MSG, class_var)
end

def on_cvasgn(node) 

def on_cvasgn(node)
  add_offense(node, :name)
end