class RuboCop::Cop::Layout::BlockAlignment

def compute_do_source_line_column(node, end_loc)
  do_loc = node.loc.begin # Actually it's either do or {.
  # We've found that "end" is not aligned with the start node (which
  # can be a block, a variable assignment, etc). But we also allow
  # the "end" to be aligned with the start of the line where the "do"
  # is, which is a style some people use in multi-line chains of
  # blocks.
  match = /\S.*/.match(do_loc.source_line)
  indentation_of_do_line = match.begin(0)
  return unless end_loc.column != indentation_of_do_line || style == :start_of_line
  {
    source: match[0],
    line: do_loc.line,
    column: indentation_of_do_line
  }
end