Fix assignments that should be comparisons x3

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@216318 91177308-0d34-0410-b5e6-96231b3b80d8

test/input.output/iostream.format/input.streams/istream.unformatted/sync.pass.cpp

@@ -53,12 +53,12 @@ int main()
         testbuf<char> sb(" 123456789");
         std::istream is(&sb);
         assert(is.sync() == 0);
-        assert(sync_called = 1);
+        assert(sync_called == 1);
     }
     {
         testbuf<wchar_t> sb(L" 123456789");
         std::wistream is(&sb);
         assert(is.sync() == 0);
-        assert(sync_called = 2);
+        assert(sync_called == 2);
     }
 }

test/utilities/memory/pointer.traits/pointer.traits.functions/pointer_to.pass.cpp

@@ -40,7 +40,7 @@ int main()
     {
         int i = 0;
         A<int> a = std::pointer_traits<A<int> >::pointer_to(i);
-        assert(a.t_ = &i);
+        assert(a.t_ == &i);
     }
     {
         (std::pointer_traits<A<void> >::element_type)0;

test/utilities/memory/pointer.traits/pointer_to.pass.cpp

@@ -24,7 +24,7 @@ int main()
     {
         int i = 0;
         int* a = std::pointer_traits<int*>::pointer_to(i);
-        assert(a = &i);
+        assert(a == &i);
     }
     {
         (std::pointer_traits<void*>::element_type)0;