[src/code.rs] Reshuffle vec construction

Author: SamuelMarks

src/code.rs

@@ -193,20 +193,17 @@ impl<'a> Struct<'a> {
 
     /// Assemble the `derive` attribute for the struct
     fn attr_derive(&self) -> String {
-        let mut derives_vec = if self.config.options.additional_derives.is_empty() {
-            Vec::with_capacity(10)
-        } else {
-            let mut _derives_vec =
-                Vec::<&str>::with_capacity(10 + self.config.options.additional_derives.len());
-            _derives_vec.extend(
+        let mut derives_vec =
+            Vec::<&str>::with_capacity(10 + self.config.options.additional_derives.len());
+        if !self.config.options.additional_derives.is_empty() {
+            derives_vec.extend(
                 self.config
                     .options
                     .additional_derives
                     .iter()
                     .map(|s| -> &str { s.as_ref() }),
             );
-            _derives_vec
-        };
+        }
         // Default derives that exist on every struct
         derives_vec.extend_from_slice(&[derives::DEBUG, derives::CLONE]);