class RuboCop::Cop::Layout::LeadingBlankLines

# a comment
# (start of file)
# good
end
class Foo
# (start of file)
# good
# a comment
# (start of file)
# bad
end
class Foo
# (start of file)
# bad
@example
of a file.
This cop checks for unnecessary leading blank lines at the beginning

def autocorrect(node) 

def autocorrect(node)
  range = Parser::Source::Range.new(processed_source.buffer,
                                    0,
                                    node.begin_pos)
  lambda do |corrector|
    corrector.remove(range)
  end
end

def investigate(processed_source) 

def investigate(processed_source)
  token = processed_source.tokens[0]
  return unless token && token.line > 1
  add_offense(processed_source.tokens[0],
              location: processed_source.tokens[0].pos)
end