clippy: merge two match arms in IResult management

The two arms has an identical body.
+ enable `clippy::match_same_arms` lint
help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_same_arms

src/errors.rs

@@ -66,8 +66,9 @@ impl<I: Default + Eq, O, E: fmt::Debug> IResultExt<I, O, E> for IResult<I, O, E>
             }
             IResult::Err(err) => match err {
                 nom::Err::Incomplete(_) => Err(SubError::IncompleteInput),
-                nom::Err::Error(err) => Err(SubError::Parse(format!("{err:?}"))),
-                nom::Err::Failure(err) => Err(SubError::Parse(format!("{err:?}"))),
+                nom::Err::Error(err) | nom::Err::Failure(err) => {
+                    Err(SubError::Parse(format!("{err:?}")))
+                }
             },
         }
     }

src/lib.rs

@@ -13,6 +13,7 @@
 #![deny(clippy::borrowed_box)]
 #![deny(clippy::clone_on_copy)]
 #![deny(clippy::doc_markdown)]
+#![deny(clippy::match_same_arms)]
 #![deny(clippy::missing_panics_doc)]
 #![deny(clippy::missing_fields_in_debug)]
 #![deny(clippy::must_use_candidate)]