Add matches! test case for issue 5709

Author: ytmimi

tests/source/issue_5709.rs

@@ -0,0 +1,9 @@
+// rustfmt-version: Two
+
+fn is_something(foo: Foo, bar: Bar) -> bool {
+    matches!((legacy_required_finality, signature_weight),
+        | (LegacyRequiredFinality::Any, Insufficient | Weak | Strict)
+        | (LegacyRequiredFinality::Weak, Weak | Strict)
+        | (LegacyRequiredFinality::Strict, Strict)
+    )
+}

tests/target/issue_5709.rs

@@ -0,0 +1,10 @@
+// rustfmt-version: Two
+
+fn is_something(foo: Foo, bar: Bar) -> bool {
+    matches!(
+        (legacy_required_finality, signature_weight),
+        (LegacyRequiredFinality::Any, Insufficient | Weak | Strict)
+        | (LegacyRequiredFinality::Weak, Weak | Strict)
+        | (LegacyRequiredFinality::Strict, Strict)
+    )
+}