puppetlabs/puppetlabs-concat — pull request #124 by jhoblitt (2013-12-23 21:32:30+00:00)
Title: revert concat $warn/$warn_message param split + add deprecation warnings

Partially reverting the $warn/$warn_message param split from eaf8407 as this
change was unnecessarily API breaking. Instead, we are adding string/bool type
validating to the $warn parameter and deprecation warnings for the usage of
stringified boolean values (eg, 'true', 'on', etc.). In a future major release,
the logic can be simplified to treating all string values as a warning message.