suggest clarification

docs/beginner/tutorial2-surface/README.md

@@ -338,7 +338,7 @@ Now we can actually get to clearing the screen (long time coming). We need to us
 }
 ```
 
-First things first, let's talk about the `{}`. `encoder.begin_render_pass(...)` borrows `encoder` mutably (aka `&mut self`). We can't call `encoder.finish()` until we release that mutable borrow. The `{}` around `encoder.begin_render_pass(...)` tells rust to drop any variables within them when the code leaves that scope thus releasing the mutable borrow on `encoder` and allowing us to `finish()` it. If you don't like the `{}`, you can also use `drop(render_pass)` to achieve the same effect.
+First things first, let's talk about the `{}`. `encoder.begin_render_pass(...)` borrows `encoder` mutably (aka `&mut self`). We can't call `encoder.finish()` until we release that mutable borrow. The block (`{}`) around `encoder.begin_render_pass(...)` tells rust to drop any variables within them when the code leaves that scope thus releasing the mutable borrow on `encoder` and allowing us to `finish()` it. If you don't like the `{}`, you can also use `drop(render_pass)` to achieve the same effect.
 
 We can get the same results by removing the `{}`, and the `let _render_pass =` line, but we need access to the `_render_pass` in the next tutorial, so we'll leave it as is.