Fix handling for blocks with arity > 1 where expected arity is 1

Looks like this was broken in Roda 3.18.0.

CHANGELOG

@@ -1,5 +1,7 @@
 = master
 
+* Fix handling for blocks with arity > 1 where expected arity is 1 (jeremyevans)
+
 * Improve performance for handling blocks with arity 0 where expected arity is 1 by avoiding instance_exec (jeremyevans)
 
 * Improve terminal maching by around 4x (jeremyevans)

lib/roda.rb

@@ -203,6 +203,9 @@ def define_roda_method(meth, expected_arity, &block)
                 undef_method temp_method
                 private meth
                 meth = :"#{meth}_arity"
+              elsif required_args > 1
+                b = block
+                block = lambda{|r| instance_exec(r, &b)} # Fallback
               end
             when :any
               if check_dynamic_arity = opts.fetch(:check_dynamic_arity, check_arity)

spec/define_roda_method_spec.rb

@@ -55,6 +55,9 @@
 
     m1 = app.define_roda_method("x", 1){2}
     @scope.send(m1, 3).must_equal 2
+
+    m1 = app.define_roda_method("x", 1){|x, y| [x, y]}
+    @scope.send(m1, 4).must_equal [4, nil]
   end
 
   it "should raise for unexpected expected_arity" do