How to escape a hyphen

[NetScr1be]

In the code;

mindmap
  root((Root))
    Services
      "On/Off-Ramp"

The hyphen between Off and Ramp throws;

Error: Lexical error on line 4. Unrecognized text.
...rvices "On/Off-Ramp"
----------------------^

With the ponter pointing at the wrong character

IS there a way to indicate the hyphen is literal?

[kerryj89]

Admittedly ugly but it works until we have a better solution:

mindmap
  root((Root))
    Services
      "On/Off#45;Ramp"