port info long description not formatted correctly in trunk

[Ryan Schmidt]

We have a regression from 1.7.0 on trunk when the ${description}  
variable is included in the long_description. Now, it's surrounded by  
curly braces, but this was not the case with 1.7.0.

I filed a bug here:

http://trac.macports.org/ticket/18482

Perhaps someone knows how to fix this.