Fixed typo in ps-macro-lib.lisp
Fixed typo in ps-macro-lib.lisp

JackDanger/parenscript,VincentToups/parenscript,3b/parenscript,fredericksilva/Parenscript,vsedach/Parenscript,JDReutt/parenscript,manuel/parenscript,JackDanger/parenscript,JackDanger/parenscript