Commit 7dd27cbe5b (support/download: add support to exclude svn
externals) introduced an improperly formatted list item. That was
carried over with bf2d7f8f53 (package/pkg-generic: don't download svn
externals by default).
Fix that.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
96130dc204