"All \"special\" characters like \\ must be escaped."
[[All "special" characters like \ are fine as-is.
Also, line breaks work.
Even double line breaks!]]
[=[For when you want literal [[double brackets]] in your
"double bracketed string" with \backslashes and line breaks.]=]
[=======[For when you really like lots of equals signs,
or for some reason want a literal [=[ or [====[ in your string.
As long as there are the same number on both sides,
it doesn't matter how many there are.]=======]