I just opened my own project, without modifying it. No problem with B4J V. 9.00; with V. 9.10 Beta:
[As you can see the code is in class B4XSimpleCodeHighLighter, so you can verify yourself by testing it, although it would also be possible to do it in a new project that contains that literal].
P.S. It happens only in a construct like this:
[Another good reason to avoid literals and to use constants ]