class RuboCop::Cop::Style::NumberedParameters


collection.each { |item| puts item }
# good
collection.each { puts _1 }
# bad
@example EnforcedStyle: disallow
collection.each { puts _1 }
# good
end
puts _1
collection.each do
# bad
@example EnforcedStyle: allow_single_line (default)
single-lined blocks, or disallow completely numbered parameters.
It can either restrict the use of numbered parameters to
Checks for numbered parameters.

def on_numblock(node) 

def on_numblock(node)
  if style == :disallow
    add_offense(node, message: MSG_DISALLOW)
  elsif node.multiline?
    add_offense(node, message: MSG_MULTI_LINE)
  end
end