anchor.diff:     > (write-bytes! \"tests/data/abc_.txt\" `(97 98 99))
      out = true
      ```"
  -  (write-all-mode! path false true (string/bytes->string data)))
  +  (write-all-bytes-mode! path false data))
   
   (defun append-all! (path data)
     "Appends the string DATA to the file at PATH.
  
positive.code: 
  (defun write-all-mode! (path append binary data) :hidden
    (with (handle (open path (.. (if append "a" "w") (if binary "b" ""))))
      (if handle
        (progn
          (self handle :write data)
          (self handle :close)
          true)
        false)))
  
  (defun write-all! (path data)
    "Writes the string DATA to the file at PATH.
  
negative.code:    > (append-bytes! \"tests/data/abc_.txt\" `(100 101 102))
     out = true
     ```"
    (write-all-bytes-mode! path true data))
  