show missing imports in map doc
@@ -57,7 +57,7 @@ where
///
/// ```rust
/// # #[macro_use] extern crate nom;
-/// # use nom::{Err,error::ErrorKind, IResult,Parser};
+/// use nom::{Err,error::ErrorKind, IResult,Parser};
/// use nom::character::complete::digit1;
/// use nom::combinator::map;
/// # fn main() {
