some typos

docs/beginner/tutorial1-window/README.md

@@ -18,7 +18,7 @@ pollster = "0.2"
 ```
 
 ## Using Rust's new resolver
-As of version 0.10, wgpu require's cargo's [newest feature resolver](https://doc.rust-lang.org/cargo/reference/resolver.html#feature-resolver-version-2). As a result you must include `resolver = 2` in either the `[package]` section of `Cargo.toml` if you are working on a single crate, or the `[workspace]` section of the root `Cargo.toml` in a workspace.
+As of version 0.10, wgpu require's cargo's [newest feature resolver](https://doc.rust-lang.org/cargo/reference/resolver.html#feature-resolver-version-2). As a result you must include `resolver = "2"` in either the `[package]` section of `Cargo.toml` if you are working on a single crate, or the `[workspace]` section of the root `Cargo.toml` in a workspace.
 
 ## The code
 There's not much going on here yet, so I'm just going to post the code in full. Just paste this into your `main.rs` or equivalent.

docs/beginner/tutorial2-surface/README.md

@@ -64,7 +64,7 @@ impl State {
 
 ### Instance and Adapter
 
-The `instance` is the first thing you create when using wgpu. It's may purpose
+The `instance` is the first thing you create when using wgpu. It's main purpose
 is to create `Adapter`s and `Surface`s.
 
 The `adapter` is a handle to our actual graphics card. You can use this get information about the graphics card such as its name and what backend the adapter uses. We use this to create our `Device` and `Queue` later.