doc tweak

src/lib.rs

@@ -98,8 +98,8 @@ pub mod sqlite_plugin {
         Ok(())
     }
 
-    /// Returns the timestamp portion as number of fractional seconds (`f64`),
-    /// for use in SQLite's `datetime()` function.
+    /// Returns the timestamp portion as fractional seconds (`f64`), for
+    /// convenient use in SQLite's `datetime()` function.
     ///
     /// ```text
     /// sqlite> select julid_seconds(julid_new());