Add example code snippet

content/posts/rust-di-mocking.md

@@ -10,7 +10,7 @@ tags = ["rust", "testing"]
 Rust is hard.
 {{< /lead >}}
 
-That's one of my takeways from one of my recent endeavors during the winter break.
+That's one of my takeways from a recent endeavor during the winter break.
 
 {{< forgejo repo="ghoscht/picoKontroller" >}}
 
@@ -19,3 +19,14 @@ Rust isn't necessarily suited for pure object oriented programming.
 
 ## Getting Started
 Use [Shaku](https://github.com/AzureMarker/shaku) and [Mockall](https://github.com/asomers/mockall)
+
+{{< highlight rust "linenos=table" >}}
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Cli {
+    #[arg(long, help = "List all available MIDI devices.")]
+    list_midi: bool,
+    #[arg(long, help = "List all available MPRIS players.")]
+    list_mpris: bool,
+}
+{{< / highlight >}}