Re: [PATCH] git-fetch --tags: deal with tags with spaces in them.

"H. Peter Anvin" [off-list ref] writes:

We can disallow whitespace, and we *have* to disallow at least newline 
due to the file format; I believe we should disallow all control 
characters (0-31, 127-159.)

I agree.

Currently SP, TAB, and LF are all we care about, and nothing
else; NUL does not even count.  But if we are codifying a list
of disallowed byte values, excluding all control characters is
probably a sane thing to do, without introducing arbitrary and
unnecessary limitation too much.