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