bug#34858: indent-relative called with prefix calls tab-to-tab-stop

[Alex Branham]

The docstring of indent-relative says:

If the previous nonblank line has no indent points beyond the
column point starts at, then `tab-to-tab-stop' is done, if both
FIRST-ONLY and UNINDENTED-OK are nil, otherwise nothing is done
in this case.

Yet in a buffer like this:

foo

with point at the beginning of line, C-u M-x indent-relative results in:

        test

I'm happy to submit a patch fixing this, but should it update the
documentation to match what happens or should it update the code to
match the documentation?

Thanks,
Alex