Add recursive config to issue-3665

Author: sasurau4

tests/source/issue-3665/lib.rs

@@ -1,3 +1,4 @@
+// rustfmt-recursive: true
 #![rustfmt::skip::attributes(skip_mod_attr)]
 
 mod sub_mod;

tests/target/issue-3665/lib.rs

@@ -1,3 +1,4 @@
+// rustfmt-recursive: true
 #![rustfmt::skip::attributes(skip_mod_attr)]
 
 mod sub_mod;