method.erb in slack-ruby-client-2.4.0

- old
+ new

@@ -36,9 +36,10 @@
           def <%= group.gsub(".", "_") %>_<%= name %>(options = {})
 <% data['args'].select{ |k, v| v['required'] }.each do |arg_name, arg_v| %>
             raise ArgumentError, 'Required arguments :<%= arg_name %> missing' if options[:<%= arg_name %>].nil?
 <% end %>
 <% data['arg_groups']&.each do |arg_group| %>
+  <% next if arg_group['args'].size <= 1 %>
 <% arg_string = arg_group['args'].map { |arg_name| ":#{arg_name}" }.join(', ') %>
 <% if arg_group['mutually_exclusive'] %>
             raise ArgumentError, 'Exactly one of <%= arg_string %> is required' unless <%= arg_group['args'].map { |arg_name| "options[:#{arg_name}].nil?" }.join(' ^ ') %>
 <% else %>
             raise ArgumentError, 'At least one of <%= arg_string %> is required' if <%= arg_group['args'].map { |arg_name| "options[:#{arg_name}].nil?"}.join(' && ') %>