not quoting null twice (issue 139)
not quoting null twice (issue 139)

aoh/owl-lisp,aisamanra/owl-lisp,yuriy-chumak/OL,yuriy-chumak/OL,yuriy-chumak/OL,yuriy-chumak/OL,aisamanra/owl-lisp,yuriy-chumak/OL,yuriy-chumak/OL,aisamanra/owl-lisp,aoh/owl-lisp,aoh/owl-lisp