This tag suppresses the execution and output of any contained content, although the contained content must be syntactically correct.
For example:
>>> import albatross
>>> ctx = albatross.SimpleContext('.')
>>> albatross.Template(ctx, '<magic>', '''
... Before,<al-comment>
... This will not be executed
... </al-comment> after.
... ''').to_html(ctx)
>>> ctx.flush_content()
Before, after.