Fix documentation typo

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Author: andersk

README.md

@@ -6,7 +6,7 @@ alternative to the built-in `#[derive(FromPrimitive)]`, which
 requires the unstable `std::num::FromPrimitive` and is disabled in
 Rust 1.0.
 
-The current implementation requires all variants of the num to
+The current implementation requires all variants of the enum to
 have an explicit discriminator value.  This restriction may be
 relaxed in future versions.
 

src/lib.rs

@@ -28,7 +28,7 @@
 //! requires the unstable `std::num::FromPrimitive` and is disabled in
 //! Rust 1.0.
 //!
-//! The current implementation requires all variants of the num to
+//! The current implementation requires all variants of the enum to
 //! have an explicit discriminator value.  This restriction may be
 //! relaxed in future versions.
 //!