guide: Add str examples to supported types section

examples/guide-supported-types-examples/src/lib.rs

@@ -5,3 +5,4 @@ extern crate wasm_bindgen;
 
 pub mod imported_types;
 pub mod exported_types;
+pub mod str;

examples/guide-supported-types-examples/src/str.rs

@@ -0,0 +1,4 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn take_str_by_shared_ref(x: &str) {}

examples/guide-supported-types-examples/str.js

@@ -0,0 +1,5 @@
+import {
+  take_str_by_shared_ref,
+} from './guide_supported_types_examples';
+
+take_str_by_shared_ref('hello');

guide/src/reference/types.md

@@ -44,13 +44,25 @@ JavaScript.
 
 | `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |
 |:---:|:---:|:---:|:---:|:---:|:---:|:---:|
-| No | Yes | No | Yes | Yes | No | JavaScript string value |
+| No | Yes | No | No | No | No | JavaScript string value |
 
 Copies the string's contents back and forth between the JavaScript
 garbage-collected heap and the Wasm linear memory with `TextDecoder` and
 `TextEncoder`. If you don't want to perform this copy, and would rather work
 with handles to JavaScript string values, use the `js_sys::JsString` type.
 
+### Example Rust Usage
+
+```rust
+{{#include ../../../examples/guide-supported-types-examples/src/str.rs}}
+```
+
+### Example JavaScript Usage
+
+```js
+{{#include ../../../examples/guide-supported-types-examples/str.js}}
+```
+
 ## `String`
 
 | `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |