Fix small "presentation" issues

scm/inc/compiler.scm

  (emit "movl $0,  %eax")                ; zero %eax to put the result of the comparison into
  (emit "sete %al")                      ; set low byte of %eax to 1 if cmp succeeded
  (emit "sall $~a,  %eax" boolean-shift) ; construct correctly tagged boolean value
  (emit "xorl $31, %eax"))
  (emit "xorl $~a, %eax" #b0011111))
(define (emit-expr x)
  (cond
       ((boolean?)
        (emit-expr (primcall-operand1 x))
        (emit "andl $~a, %eax" #b0011111)
        (emit "cmpl $~a,  %eax" #b0011111)
        (emit "cmpl $~a, %eax" #b0011111)
        (emit-compare))
       ))))