This will fix the formatting shown on detect|find and revese_arch
generated by RDoc.

[Fix GH-1816]

From: Espartaco Palma <esparta@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62397 b2dd03c8-39d4-4d8f-98ff-823fe69b080e