Update src/main.rs

Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>

src/main.rs

@@ -175,23 +175,12 @@ fn retrieve_doc_item(node: &AttrpathValue) -> Option<DocItem> {
 
 /// Dedent everything but the first line, whose indentation gets fully removed all the time
 fn process_doc(raw: &str) -> Option<String> {
-    let result = if let Some((first, rest)) = raw.split_once('\n') {
-        let mut result = String::new();
-        result.push_str(first.trim());
-        result.push('\n');
-        result.push_str(&dedent(rest));
-        result
-    } else {
-        raw.trim().to_owned()
+    let result: Cow<str> = match raw.split_once('\n') {
+        Some((first, rest)) => format!("{}\n{}", first.trim(), dedent(rest)).into(),
+        None => raw.into(),
     };
 
-    let result = result.trim().to_owned();
-
-    if result.is_empty() {
-        None
-    } else {
-        Some(result)
-    }
+    Some(result.trim().to_owned()).filter(|s| !s.is_empty())
 }
 
 /// Dumb, mutable, hacky doc comment "parser".