anchor.diff:    `("_I_=" ,(transpiler-symbol-string *js-transpiler* tag) "; continue"))
   
   (define-js-macro vm-go-nil (val tag)
  -  `("if (!" ,val ") {_I_=" ,(transpiler-symbol-string *js-transpiler* tag) "; continue;}"))
  +  `("if (" ,val " === null || " ,val " === false || " ,val " === undefined) {_I_=" ,(transpiler-symbol-string *js-transpiler* tag) "; continue;}"))
   
   (define-js-macro identity (x)
     x)
  
positive.code: ;;;;; Transpiler: TRE to JavaScript
  ;;;;; Copyright (c) 2008 Sven Klose <pixel@copei.de>
  ;;;;;
  ;;;;; Code generation
  
  ;;;; TRANSPILER-MACRO EXPANDER
  
  
negative.code: (define-js-macro %%usetf-href (val &rest x)
    `(%%usetf-aref ,val ,@x))
  
  (define-js-macro make-hash-table (&rest args)
    `("{"
      ,@(when args
  