bug#70868: 30.0.50; pp--insert-lisp prints small integers as characters

[No Wayman <iarchivedmywholelife@gmail.com>]

From the body of pp--insert-lisp in pp.el:


```emacs-lisp
;; Print some of the smaller integers as characters, perhaps?
(integer
 (if (<= ?0 sexp ?z)
     (let ((print-integers-as-characters t))
       (princ sexp (current-buffer)))
   (princ sexp (current-buffer))))
```

I stumbled on this behavior in a program of which pretty prints 
elisp forms as part of a report.
I don't want characters when the input form originally included 
integers.
Why do we do this here? The commentary doesn't offer any insight 
and sounds confused about the behavior, too.
Is it worth making configurable, or outright removing?