ndarray_from_numpy example to code not pointed out to clippy

Author: higumachan

src/doc/ndarray_for_numpy_users/mod.rs

@@ -605,7 +605,7 @@
 //!
 //! </td><td>
 //!
-//! `a.mapv(|x| f32::from(x))`
+//! `a.mapv(f32::from)`
 //!
 //! </td><td>
 //!
@@ -619,7 +619,7 @@
 //!
 //! </td><td>
 //!
-//! `a.mapv(|x| i32::from(x))`
+//! `a.mapv(i32::from)`
 //!
 //! </td><td>
 //!