sensu/sensu — pull request #576 by piavlo (2013-07-16 13:02:02+00:00)
Title: allow specifying empty defaults for command tokens

currently to use and optional command token in a check one has to put on empty string like
:::some.attribute| ::: for workaround, this patch allows to just use :::some.attribute|:::
the presence of "|" means that there is a default and default as anempty string is valid too