When you want to define multiline strings in Ruby, we can use ruby heredoc in the following way:

a_string = (<<~MSG)
This is a heredoc example.
#{Time.now}
MSG

Though there are serval ways to define heredoc, but I think the foregoing way should be the primary way.

str = <<HEREDOC
This is
a sample
text.
HEREDOC

str = <<-HEREDOC
This is
a sample
text.
HEREDOC

str = %Q(
This is
a sample
text.
)