Syntax was added to explicitly specify a module, class or function with
`--test-tags`: b729a11a12
The documentation was not updated to reflect this, leading to confusion
as people tried to reconcile the documentation with the actual behavior,
without necessarily having seen `odoo-bin --help` which is explicit
about it.
closesodoo/documentation#1258
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>