doc: Consistent grammar

Author: KSXGitHub

src/data_tree.rs

@@ -8,7 +8,7 @@ use super::size::Size;
 
 /// Disk usage data of a filesystem tree.
 ///
-/// **Serializing and deserializing:** _(feature: `json`)_ `DataTree` does not implement
+/// **Serialization and deserialization:** _(feature: `json`)_ `DataTree` does not implement
 /// [`Serialize`](serde::Serialize) and [`Deserialize`](serde::Deserialize) traits directly,
 /// instead, it can be converted into/from a [`Reflection`] which implements these traits.
 #[derive(Debug, PartialEq, Eq)]