Nested string templates not highlighted correctly

[pokrakam]

A nested string template causes the rest of the code to be shown as string. Possibly also has other side effects.

Code:

CLASS main DEFINITION CREATE PUBLIC.

  PUBLIC SECTION.
    METHODS run.
  PROTECTED SECTION.
  PRIVATE SECTION.

ENDCLASS.

CLASS main IMPLEMENTATION.

  METHOD run.
    DATA(foo) = `foo`.
    DATA(foo_up) = |x = { to_upper( |{ foo }| ) }|.
    WRITE / foo_up.
  ENDMETHOD.

ENDCLASS.

[larshp]

thanks