Fix more unreserved names

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@304383 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/string_view b/include/string_view
index 75374d2..4c759ab 100644
--- a/include/string_view
+++ b/include/string_view
@@ -356,9 +356,9 @@
 
 	_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
 	int compare(                       size_type __pos1, size_type __n1, 
-				basic_string_view _sv, size_type __pos2, size_type __n2) const
+				basic_string_view __sv, size_type __pos2, size_type __n2) const
 	{
-		return substr(__pos1, __n1).compare(_sv.substr(__pos2, __n2));
+		return substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2));
 	}
 
 	_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY