sinatra/sinatra — pull request #907 by kgrz (2014-07-24 02:52:13+00:00)
Title: Update ShowExceptions to suit latest rack master

* Post 893a2c50 in rack/rack, the #pretty method used while generating
the HTML error markup, implemented in Rack::ShowExceptions, returns a
String instead of an Array. This change uses Array() to
convert the exception string in both plain text and HTML modes
to an array.

* Should fix #906