fix clippy

Author: sunshowers

code/.gitignore

@@ -1,2 +1,2 @@
-/target/
+/target
 /Cargo.lock

code/managing-colors/src/lib.rs

@@ -35,7 +35,7 @@ impl MyValue {
     pub fn display(&self) -> MyValueDisplay<'_> {
         MyValueDisplay {
             value: self,
-            styles: Box::new(Styles::default()),
+            styles: Box::default(),
         }
     }
 }