Additional specs for destructuring in for loops

The extra cases have been based on the different parse results that
Prism generates for these code snippets.

language/for_spec.rb

@@ -19,6 +19,27 @@
     end
   end
 
+  it "iterates over a list of arrays and destructures with an empty splat" do
+    for i, * in [[1,2]]
+      i.should == 1
+    end
+  end
+
+  it "iterates over a list of arrays and destructures with a splat" do
+    for i, *j in [[1,2]]
+      i.should == 1
+      j.should == [2]
+    end
+  end
+
+  it "iterates over a liestof arrays and destructures with a splat and additional targets" do
+    for i, *j, k in [[1,2]]
+      i.should == 1
+      j.should == []
+      k.should == 2
+    end
+  end
+
   it "iterates over an Hash passing each key-value pair to the block" do
     k = 0
     l = 0