Simplify merge_opts

src/lib.rs

@@ -335,11 +335,9 @@ trait Merge {
     fn merge(self, other: Self) -> Self;
 
     fn merge_opts<T>(this: Option<T>, other: Option<T>) -> Option<T> {
-        match (this, other) {
-            (Some(t), Some(_)) => Some(t),
-            (Some(t), None) => Some(t),
-            (None, Some(o)) => Some(o),
-            (None, None) => None,
+        match &this {
+            Some(_) => this,
+            None => other,
         }
     }