Suppress libcore/ptr/mod.rs filelength lint

Author: dtolnay

src/libcore/ptr/mod.rs

@@ -65,6 +65,7 @@
 //! [`write_volatile`]: ./fn.write_volatile.html
 //! [`NonNull::dangling`]: ./struct.NonNull.html#method.dangling
 
+// ignore-tidy-filelength
 // ignore-tidy-undocumented-unsafe
 
 #![stable(feature = "rust1", since = "1.0.0")]