Refactoring the code to make the behavior explicit

We only want to check if the value is different from false.

Author: rafaelfranca

lib/thor.rb

@@ -81,7 +81,7 @@ def long_desc(long_description, options = {})
         command.long_description = long_description if long_description
       else
         @long_desc = long_description
-        @long_desc_wrap = options[:wrap] || options[:wrap].nil?
+        @long_desc_wrap = options[:wrap] != false
       end
     end