Bug#193519: how to separate multiple tags in the Tags: header to submit@bugs.debian.org?

[Kalle Olavi Niemitalo <kon@iki.fi>]

Package: www.debian.org
Version: 20030516
Severity: wishlist

<http://www.debian.org/Bugs/Reporting.en.html#tags> explains:

| You can set tags on a bug as you are reporting it.  For
| example, if you are including a patch with your bug report,
| you may wish to set the patch tag.  This is not required,
| however, and the developers will set tags on your report as
| and when it is appropriate.
|
| To set tags, put a line like this one in the pseudo-header:
|
|   Tags: <tags>
|
| Replace <tags> with one or more of the available tags, as
| described in the developers' documentation.

This does not say whether multiple tags should be separated by
spaces, commas or something else.  I can't find this information
in the developers' documentation either; the "tags" command to
control@bugs.debian.org is not promised to accept multiple tags.
Please describe the delimiter at the same place as the Tags:
header.