Error stuff

src/error.rs

@@ -3,6 +3,11 @@ use std::fmt::{Display, Formatter};
 
 macro_rules! impl_error {
     ($($name: ident ($typ: ty)),*; $($simple_name: ident),*) => {
+        /// favicon-scraper's automatically generated Error type.
+        ///
+        /// If more fatal errors are introduced in the future, this type may expand.
+        /// Hence why it's marked as `non_exhaustive`.
+        #[non_exhaustive]
         #[derive(Debug)]
         pub enum Error {
             $($simple_name,)*