Add test

Author: tesuji

tests/ui/option_and_then_some.fixed

@@ -19,3 +19,7 @@ pub fn foo() -> Option<String> {
     let x = Some(String::from("hello"));
     Some("hello".to_owned()).and_then(|s| Some(format!("{}{}", s, x?)))
 }
+
+pub fn example2(x: bool) -> Option<&'static str> {
+    Some("a").and_then(|s| Some(if x { s } else { return None }))
+}

tests/ui/option_and_then_some.rs

@@ -19,3 +19,7 @@ pub fn foo() -> Option<String> {
     let x = Some(String::from("hello"));
     Some("hello".to_owned()).and_then(|s| Some(format!("{}{}", s, x?)))
 }
+
+pub fn example2(x: bool) -> Option<&'static str> {
+    Some("a").and_then(|s| Some(if x { s } else { return None }))
+}