fixed up tests

imgui/src/lib.rs

@@ -426,8 +426,8 @@ impl Ui {
     ///     // or you could call
     ///     // if you want to let it drop on its own, name it `_wt`.
     ///     // never name it `_`, as this will drop it *immediately*.
-    ///     wt.unwrap().end();
-    /// }
+    ///     wt.end();
+    /// };
     /// ```
     pub fn window<Label: AsRef<str>>(&self, name: Label) -> Window<'_, '_, Label> {
         Window::new(self, name)

imgui/src/stacks.rs

@@ -418,7 +418,7 @@ impl<'ui> Ui {
     ///     for num in 0..10 {
     ///         // And now we add the loop number to the stack too,
     ///         // to make our buttons unique within this window.
-    ///         let _id = ui.push_id(num);
+    ///         let _id = ui.push_id_usize(num);
     ///         if ui.button("Click!") {
     ///             println!("Button {} clicked", num);
     ///         }