merged version3, almost finished but want inspect rendered version

book/3_generators_pin.html

@@ -642,6 +642,12 @@ the last topic before we implement our main Futures example.</p>
 <p>Thanks to <a href="https://github.com/rust-lang/rust/pull/45337/files">PR#45337</a> you can actually run code like the one in our
 example in Rust today using the <code>static</code> keyword on nightly. Try it for
 yourself:</p>
+<blockquote>
+<p>Beware that the API is changing rapidly. As I was writing this book, generators
+had an API change adding support for a &quot;resume&quot; argument to get passed into the
+generator closure.</p>
+<p>Follow the progress on the <a href="https://github.com/rust-lang/rust/issues/43122">tracking issue #4312</a> for <a href="https://github.com/rust-lang/rfcs/blob/master/text/2033-experimental-coroutines.md">RFC#033</a>.</p>
+</blockquote>
 <pre><pre class="playpen"><code class="language-rust">#![feature(generators, generator_trait)]
 use std::ops::{Generator, GeneratorState};
 
@@ -715,6 +721,21 @@ pub fn main() {
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