strings.rb

class MyStrings
  def dash_heredoc
    <<-HEREDOC
      This is a multiline string in Ruby using the older indented syntax.
      These lines will have a bunch of leading whitespace.
    HEREDOC
  end

  def squiggly_heredoc
    <<~HEREDOC
      This is a multiline string in Ruby using the new squiggly HEREDOC syntax.
      These lines should have no leading whitespace...
        ...unless they are indented deeper than the shallowest line.
    HEREDOC
  end
end

strings = MyStrings.new

puts "Old indented heredoc (<<-):"
puts
puts strings.dash_heredoc
puts

puts "New squiggly heredoc (<<~):"
puts
puts strings.squiggly_heredoc
puts

# OUTPUT:
# Old indented heredoc (<<-):
#
#       This is a multiline string in Ruby using the older indented syntax.
#       These lines will have a bunch of leading whitespace.
#
# New squiggly heredoc (<<~):
#
# This is a multiline string in Ruby using the new squiggly HEREDOC syntax.
# These lines should have no leading whitespace...
#   ...unless they are indented deeper than the shallowest line.