Fix method in parse_tokens doc comment
diff --git a/src/lib.rs b/src/lib.rs
index ae5fe08..4c3cfa7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -229,7 +229,7 @@
 ///
 /// fn run() -> Result<()> {
 ///     let code = quote!(assert_eq!(u8::max_value(), 255));
-///     let expr = syn::parse_token::<Expr>(code)?;
+///     let expr = syn::parse_tokens::<Expr>(code)?;
 ///     println!("{:#?}", expr);
 ///     Ok(())
 /// }