Because the syntax is generated, it can automatically add new symbols as newLISP is updated, and it will be perfectly tailored to your newLISP installation (Mac, Linux, Win, OS/2; ASCII, UTF8).
http://www.newlisp.org/index.cgi?Code_Contributions

v0.50
* Upgraded to be properly compatible with jEdit 4.3.
* Some deprecated functions for newLISP v10 are now highlighted as INVALID.
* Full newlispdoc 1.8 syntax has also been added