Fix clippy.

src/wasm_test/diff.rs

@@ -12,6 +12,7 @@ pub struct WasmDiffResult<'s> {
 
 #[derive(Debug)]
 pub(crate) enum WasmDiffStatus {
+    #[allow(dead_code)]
     Good,
     Bad(Cow<'static, str>),
 }
@@ -50,7 +51,7 @@ impl<'s> WasmDiffResult<'s> {
     fn print_indented(
         &self,
         indentation: usize,
-        original_document: &str,
+        _original_document: &str,
     ) -> Result<(), Box<dyn std::error::Error>> {
         let status_text = {
             if self.is_self_bad() {
@@ -90,7 +91,7 @@ impl<'s> WasmDiffResult<'s> {
         );
 
         for child in self.children.iter() {
-            child.print_indented(indentation + 1, original_document)?;
+            child.print_indented(indentation + 1, _original_document)?;
         }
 
         Ok(())