minus.rb in sparql-3.1.0

- old
+ new
@@ -33,19 +33,19 @@
       # @yieldreturn [void] ignored
       # @return [RDF::Query::Solutions]
       #   the resulting solution sequence
       # @see    http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#defn_algMinus
       # @see    http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#negation
-      def execute(queryable, options = {}, &block)
+      def execute(queryable, **options, &block)
         # Let Ω1 and Ω2 be multisets of solution mappings. We define:
         # 
         # Minus(Ω1, Ω2) = { μ | μ in Ω1 . ∀ μ' in Ω2, either μ and μ' are not compatible or dom(μ) and dom(μ') are disjoint }
         # 
         # card[Minus(Ω1, Ω2)](μ) = card[Ω1](μ)
         debug(options) {"Minus"}
-        left = queryable.query(operand(0), options.merge(depth: options[:depth].to_i + 1))
+        left = queryable.query(operand(0), depth: options[:depth].to_i + 1, **options)
         debug(options) {"(minus left) #{left.inspect}"}
-        right = queryable.query(operand(1), options.merge(depth: options[:depth].to_i + 1))
+        right = queryable.query(operand(1), depth: options[:depth].to_i + 1, **options)
         debug(options) {"(minus right) #{right.inspect}"}
         @solutions = left.minus(right)
         @solutions.each(&block) if block_given?
         @solutions
       end