Syntax highlighting gets destroyed with ~S""" heredoc prefix

[tonini]

When an heredoc as an sigil in front of it, the whole syntax highlighting gets messed up.

Example source: https://github.com/elixir-lang/elixir/blob/master/lib/iex/lib/iex.ex#L2

@syohex do you have an idea how to handle this? :-)

[syohex]

Could you check #287 patch ?

[tonini]

👍