Fix misleading indentation; replace a couple of NULLs with nullptr. Resolves https://reviews.llvm.org/D42945 ; thanks to Bruce Mitchener for the patch.

llvm-svn: 324378
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 9d2690d..a94b07b 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -4703,9 +4703,9 @@
         ::new(__first2) value_type(_VSTD::move(*__first1));
         return;
     case 2:
-       __destruct_n __d(0);
+        __destruct_n __d(0);
         unique_ptr<value_type, __destruct_n&> __h2(__first2, __d);
-         if (__comp(*--__last1, *__first1))
+        if (__comp(*--__last1, *__first1))
         {
             ::new(__first2) value_type(_VSTD::move(*__last1));
             __d.__incr((value_type*)0);