Fix test case title

Author: vshabanytsia

language/hash_spec.rb

@@ -150,7 +150,7 @@ def h.to_hash; {:b => 2, :c => 3}; end
   end
 
   ruby_version_is ""..."3.4" do
-    it "expands nil using ** into {}" do
+    it "does not expand nil using ** into {} and raises TypeError" do
       h = nil
       -> { {a: 1, **h} }.should raise_error(TypeError, "no implicit conversion of nil into Hash")
 

language/method_spec.rb

@@ -1177,7 +1177,7 @@ def m(a = nil, b = {}, v: false)
 
 context "when passing **nil into a method that accepts keyword arguments" do
   ruby_version_is ""..."3.4" do
-    it "expands nil using ** into {}" do
+    it "raises TypeError" do
       def m(**kw) kw; end
 
       h = nil