Add the corrections stuff to the 88803 test case

src/test/ui/typeck/issue-88803-call-expr-method.fixed

@@ -0,0 +1,9 @@
+// run-rustfix
+
+fn main() {
+    let a = Some(42);
+    println!(
+        "The value is {}.",
+        a.unwrap() //~ERROR [E0615]
+    );
+}

src/test/ui/typeck/issue-88803-call-expr-method.rs

@@ -1,3 +1,5 @@
+// run-rustfix
+
 fn main() {
     let a = Some(42);
     println!(

src/test/ui/typeck/issue-88803-call-expr-method.stderr

@@ -1,5 +1,5 @@
 error[E0615]: attempted to take value of method `unwrap` on type `Option<{integer}>`
-  --> $DIR/issue-88803-call-expr-method.rs:5:12
+  --> $DIR/issue-88803-call-expr-method.rs:7:12
    |
 LL |         (a.unwrap)()
    |         ---^^^^^^-