Fix example

Author: sjwang05

clippy_lints/src/manual_option_folding.rs

@@ -17,15 +17,14 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```rust
-    /// // foo: impl Fn() -> X
-    /// // def: impl Fn() -> X
-    /// let mut opt: Option<X> = foo();
-    /// opt.get_or_insert_with(|| def());
-    /// let res: X = unsafe { opt.unwrap_unchecked() };
+    /// let mut opt: Option<i32> = None;
+    /// opt.get_or_insert(42);
+    /// let res = unsafe { opt.unwrap_unchecked() };
     /// ```
     /// Use instead:
     /// ```rust
-    /// let res: X = foo().unwrap_or_else(|| def());
+    /// let opt = Option<i32> = None;
+    /// let res: i32 = foo().unwrap_or(42);
     /// ```
     #[clippy::version = "1.74.0"]
     pub MANUAL_OPTION_FOLDING,