>>> import albatross
>>> ctx = albatross.SimpleContext('.')
>>> ctx.locals.opt = 3
>>> ctx.locals.sel = ['spam', 'eggs']
>>> albatross.Template(ctx, '<magic>', '''
... <al-select name="sel" multiple>
...  <al-option value="spam">Spam <al-value expr="opt"> times
...  </al-option>
...  <al-option>eggs</al-option>
...  <al-option>bacon</al-option>
... </al-select whitespace>
... ''').to_html(ctx)
>>> ctx.flush_content()
<select multiple name="sel"><option value="spam" selected>Spam 3 times
 </option><option selected>eggs</option><option>bacon</option></select>
