class RuboCop::Cop::AlignmentCorrector

def calculate_range(expr, line_begin_pos, column_delta)
  return range_between(line_begin_pos, line_begin_pos) if column_delta.positive?
  starts_with_space =
    expr.source_buffer.source[line_begin_pos].start_with?(' ')
  if starts_with_space
    range_between(line_begin_pos, line_begin_pos + column_delta.abs)
  else
    range_between(line_begin_pos - column_delta.abs, line_begin_pos)
  end
end