Allows Hash default proc to work in context.

lib/mustache/context.rb

@@ -121,22 +121,32 @@ def fetch(name, default = :__raise)
     #
     # Returns the value of key in obj if it is found and default otherwise.
     def find(obj, key, default = nil)
-      hash = obj.respond_to?(:has_key?)
-
-      if hash && obj.has_key?(key)
+      hash = obj.respond_to?(:to_hash)
+
+      if !hash
+        if obj.respond_to?(key)
+          meth = obj.method(key) rescue proc { obj.send(key) }
+          if meth.arity == 1
+            meth.to_proc
+          else
+            meth[]
+          end
+        else
+          default
+        end
+      elsif hash && obj.has_key?(key)
         obj[key]
       elsif hash && obj.has_key?(key.to_s)
         obj[key.to_s]
-      elsif !hash && obj.respond_to?(key)
-        meth = obj.method(key) rescue proc { obj.send(key) }
-        if meth.arity == 1
-          meth.to_proc
-        else
-          meth[]
-        end
       else
-        default
+        obj[key] || default
       end
     end
   end
 end
+
+class Hash
+  def to_hash
+    self
+  end unless method_defined?(:to_hash)
+end