refactor: remove unnecessary to_string calls

Author: hamirmahal

numbat/src/value.rs

@@ -84,7 +84,7 @@ impl std::fmt::Display for Value {
             Value::Boolean(b) => write!(f, "{}", b),
             Value::String(s) => write!(f, "\"{}\"", s),
             Value::DateTime(dt, _) => write!(f, "{:?}", dt),
-            Value::FunctionReference(r) => write!(f, "{}", r.to_string()),
+            Value::FunctionReference(r) => write!(f, "{}", r),
         }
     }
 }

numbat/src/vm.rs

@@ -217,7 +217,7 @@ impl Display for Constant {
             Constant::Unit(unit) => write!(f, "{}", unit),
             Constant::Boolean(val) => write!(f, "{}", val),
             Constant::String(val) => write!(f, "\"{}\"", val),
-            Constant::FunctionReference(inner) => write!(f, "{}", inner.to_string()),
+            Constant::FunctionReference(inner) => write!(f, "{}", inner),
         }
     }
 }