Fixes <https://issues.guix.gnu.org/57090>.
Reported by Christopher Rodriguez <yewscion@gmail.com>.
* guix/read-print.scm (%symbols-followed-by-octal-integers)
(%symbols-followed-by-hexadecimal-integers): New variables.
* guix/read-print.scm (integer->string): New procedure.
(pretty-print-with-comments): Use it.
* tests/read-print.scm: Add test.