Remove errorneous TRUNCASE symbol for Common Lisp
requested to merge christophejunke/syntax-highlighting:christophejunke-master-patch-38790 into master
TRUNCASE does not exist in Common Lisp, and as far as I can tell, it never was part of any Lisp dialect (and if it were, that would not be relevant today). It is most likely to be a typo that was introduced a long time ago and never fixed.
For context, this was discussed in the matterhorn project: