Fix clippy.

src/wasm/document.rs

@@ -8,8 +8,8 @@ use super::additional_property::AdditionalPropertyValue;
 use super::ast_node::WasmAstNode;
 use super::macros::to_wasm;
 use super::to_wasm::ToWasm;
-use crate::util::elisp_fact::ElispFact;
 use crate::types::Document;
+use crate::util::elisp_fact::ElispFact;
 use crate::wasm::to_wasm::ToWasmStandardProperties;
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -29,7 +29,7 @@ to_wasm!(
     { WasmAstNode::Document(original) },
     { "org-data".into() },
     {
-        let category = original.category.as_ref().map(String::as_str);
+        let category = original.category.as_deref();
         let path = original.path.clone();
 
         let mut additional_properties = AdditionalProperties::default();