bug#9664: (format #t "~3tX") fails in the REPL

[rixed]

The ~t formater is not working according to spec in the REPL.
Try this for instance:

(format #t "~10tA~20tB~30tC~40tD")

will print:

AB       C         D

Although it works from a script or when outputing to a sting.

Also, it works after a newline.