add assert_ne and debug_assert_ne macros

src/libstd/lib.rs

@@ -304,8 +304,8 @@ use prelude::v1::*;
 // We want to reexport a few macros from core but libcore has already been
 // imported by the compiler (via our #[no_std] attribute) In this case we just
 // add a new crate name so we can attach the reexports to it.
-#[macro_reexport(assert, assert_eq, debug_assert, debug_assert_eq,
-                 unreachable, unimplemented, write, writeln, try)]
+#[macro_reexport(assert, assert_eq, assert_ne, debug_assert, debug_assert_eq,
+                 debug_assert_ne, unreachable, unimplemented, write, writeln, try)]
 extern crate core as __core;
 
 #[macro_use]