>>> import albatross
>>> ctx = albatross.SimpleContext('.')
>>> ctx.locals.url = 'http://www.com/img?a=1&b=2'
>>> albatross.Template(ctx, '<magic>', '''
... <al-img expr="url" noescape whitespace>
... ''').to_html(ctx)
>>> ctx.flush_content()
<img src="http://www.com/img?a=1&b=2" />