Forum: Ruby on Rails html escape and migrating from rails 2 to rails 3

I'm migrating an app from rail 2 to rails 3 and hitting several 
instances
of strings that need to be code html_safe to prevent the default 
processing
from breaking the html.  Are there tools or techniques to easily 
identify
all such instances in the source code or is the only option to discover
each instance one at a time?  Thanks