#\u00a0 fails on CMUCL

[avodonosov]

As you can see here: https://common-lisp.net/project/cl-test-grid/library/data-table.html , you recent change from #\no-break_space to #\u00a0 fixes ABCL but breaks CMUCL.

I would suggest to use (code-char #xa0)

[bobbysmith007]

Done, thanks, hope this fixes it

[avodonosov]

(As you probably know) you can adopt cl-travis to verify every your commit on various lisp implementations