doc(example) Add white background and reduce diagram sizes

CHANGELOG.md

@@ -11,6 +11,7 @@
 - [#2026](https://github.com/wasmerio/wasmer/pull/2010) Expose trap code of a `RuntimeError`, if it's a `Trap`.
 
 ### Changed
+- [#2041](https://github.com/wasmerio/wasmer/pull/2041) Documentation diagrams now have a solid white background rather than a transparent background.
 
 ### Fixed
 

examples/README.md

@@ -70,13 +70,13 @@ example.
 3. [**Handling errors**][errors], explains the basics of interacting with
    Wasm module memory.
 
-   _Keywords_: memory, module.
+   _Keywords_: instance, error.
 
    <details>
     <summary><em>Execute the example</em></summary>
 
     ```shell
-    $ cargo run --example memory --release --features "cranelift"
+    $ cargo run --example errors --release --features "cranelift"
     ```
 
    </details>
@@ -204,7 +204,7 @@ example.
 
 ### Tunables
 
-1. **Limit memory**, explains how to use Tunables to limit the
+1. [**Limit memory**][tunables-limit-memory], explains how to use Tunables to limit the
    size of an exported Wasm memory
 
    _Keywords_: basic, tunables, memory
@@ -360,6 +360,7 @@ example.
 
    </details>
 
+[hello-world]: ./hello_world.rs
 [engine-jit]: ./engine_jit.rs
 [engine-native]: ./engine_native.rs
 [engine-headless]: ./engine_headless.rs
@@ -377,6 +378,8 @@ example.
 [wasi-pipes]: ./wasi_pipes.rs
 [table]: ./table.rs
 [memory]: ./memory.rs
+[errors]: ./errors.rs
+[tunables-limit-memory]: ./tunables_limit_memory.rs
 [`wasmer-compiler-singlepass`]: https://github.com/wasmerio/wasmer/tree/master/lib/compiler-singlepass
 [`wasmer-compiler-cranelift`]: https://github.com/wasmerio/wasmer/tree/master/lib/compiler-cranelift
 [`wasmer-compiler-llvm`]: https://github.com/wasmerio/wasmer/tree/master/lib/compiler-llvm