Fix a rustfmt error

cbarrick · cbarrick · commit 28fab730ddce · 2020-07-26T12:46:03.000-04:00
diff --git a/src/lib.rs b/src/lib.rs
@@ -27,7 +27,7 @@
     clippy::doc_markdown,
     clippy::module_name_repetitions,
     clippy::must_use_candidate,
-    clippy::option_if_let_else,
+    clippy::option_if_let_else
 )]
 #![warn(missing_docs)]
 #![warn(rust_2018_idioms)]
