Fix various test suite warnings relating to variable ambiguity and assigned but unused variables

Author: RochesterinNYC

test/distributed_internals_test.rb

@@ -72,7 +72,7 @@ def test_colliding_node_ids
     nodes = ["redis://localhost:#{PORT}/15", "redis://localhost:#{PORT}/15", *NODES]
 
     assert_raise(RuntimeError) do
-      redis = Redis::Distributed.new nodes
+      Redis::Distributed.new nodes
     end
   end
 

test/lint/sorted_sets.rb

@@ -39,8 +39,8 @@ def test_zadd
         # INCR option
         assert_equal 1.0, r.zadd("foo", 1, "s1", :incr => true)
         assert_equal 11.0, r.zadd("foo", 10, "s1", :incr => true)
-        assert_equal -Infinity, r.zadd("bar", "-inf", "s1", :incr => true)
-        assert_equal +Infinity, r.zadd("bar", "+inf", "s2", :incr => true)
+        assert_equal(-Infinity, r.zadd("bar", "-inf", "s1", :incr => true))
+        assert_equal(+Infinity, r.zadd("bar", "+inf", "s2", :incr => true))
         r.del "foo", "bar"
 
         # Incompatible options combination
@@ -101,8 +101,8 @@ def test_variadic_zadd
         # INCR option
         assert_equal 1.0, r.zadd("foo", [1, "s1"], :incr => true)
         assert_equal 11.0, r.zadd("foo", [10, "s1"], :incr => true)
-        assert_equal -Infinity, r.zadd("bar", ["-inf", "s1"], :incr => true)
-        assert_equal +Infinity, r.zadd("bar", ["+inf", "s2"], :incr => true)
+        assert_equal(-Infinity, r.zadd("bar", ["-inf", "s1"], :incr => true))
+        assert_equal(+Infinity, r.zadd("bar", ["+inf", "s2"], :incr => true))
         assert_raise(Redis::CommandError) { r.zadd("foo", [1, "s1", 2, "s2"], :incr => true) }
         r.del "foo", "bar"