Refactor: Simplify error handling in tests and fix indentation in doc comments

Author: dpsoft

tests/e2e/telemetry.rs

@@ -146,10 +146,7 @@ fn build_test_sandbox_with_env(env: Vec<(&str, &str)>) -> Option<Arc<Sandbox>> {
         return None;
     }
 
-    let (kernel, initramfs) = match kvm_artifacts_from_env() {
-        Some(a) => a,
-        None => return None,
-    };
+    let (kernel, initramfs) = kvm_artifacts_from_env()?;
 
     if !kernel.exists() {
         return None;

tests/kvm_integration.rs

@@ -8,7 +8,7 @@
 //! - Require environment variables pointing to guest artifacts:
 //!   - `VOID_BOX_KERNEL`    -> path to vmlinux or bzImage
 //!   - `VOID_BOX_INITRAMFS` -> path to initramfs (cpio.gz) that boots
-//!                             the guest-agent as PID 1.
+//!     the guest-agent as PID 1.
 //!
 //! All tests are marked `#[ignore]` so they only run when explicitly
 //! requested, e.g.: