candlepin/candlepin — pull request #439 by mstead (2013-11-25 19:24:23+00:00)
Title: Single error message when adding blacklisted overrides

No longer do a toString on the collection of messages. Instead,
build a list of non-existant repo names, and formulate a single
error message.

This commit addresses part of the issue reported in
subscription-manager BZ1030604