Update example code to 2018 edition
diff --git a/src/error.rs b/src/error.rs
index 13095cc..e3bc304 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -52,10 +52,7 @@
/// # Example
///
/// ```
- /// #[macro_use]
- /// extern crate syn;
- ///
- /// use syn::{Error, Ident, LitStr, Result};
+ /// use syn::{Error, Ident, LitStr, Result, Token};
/// use syn::parse::ParseStream;
///
/// // Parses input that looks like `name = "string"` where the key must be
@@ -72,8 +69,6 @@
/// let s: LitStr = input.parse()?;
/// Ok(s)
/// }
- /// #
- /// # fn main() {}
/// ```
pub fn new<T: Display>(span: Span, message: T) -> Self {
Error {