libstdc++: Fix names of types in comment

	* testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
	comment.
	* testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.

libstdc++-v3/ChangeLog

 2020-02-09  Jonathan Wakely  <jwakely@redhat.com>
 
+	* testsuite/20_util/function_objects/range.cmp/equal_to.cc: Fix
+	comment.
+	* testsuite/20_util/function_objects/range.cmp/less.ccL Likewise.
+
 	* include/std/ranges: Fix non-ASCII characters in comment.
 
 	* include/bits/range_cmp.h (__detail::__eq_builtin_ptr_cmp): Require

libstdc++-v3/testsuite/20_util/function_objects/range.cmp/equal_to.cc

@@ -75,7 +75,7 @@ struct Y
   operator int() const;
 };
 
-// X{} == X{} is ambiguous so ranges::equal_to{}(X{}, X{}) should be invalid
+// Y{} == Y{} is ambiguous so ranges::equal_to{}(Y{}, Y{}) should be invalid
 static_assert( !std::is_invocable_v<F&, Y, Y> );
 
 int

libstdc++-v3/testsuite/20_util/function_objects/range.cmp/less.cc

@@ -80,7 +80,7 @@ struct Y
   operator int() const;
 };
 
-// X{} == X{} is ambiguous so ranges::less{}(X{}, X{}) should be invalid
+// Y{} == Y{} is ambiguous so ranges::less{}(Y{}, Y{}) should be invalid
 static_assert( !std::is_invocable_v<F&, Y, Y> );
 
 int