fix clippy

Author: FANNG1

crates/iceberg/src/expr/predicate.rs

@@ -134,7 +134,6 @@ impl<T: Bind> Bind for UnaryExpression<T> {
 impl<T> UnaryExpression<T> {
     /// Creates a unary expression with the given operator and term.
     ///
-    ///
     /// # Example
     ///
     /// ```rust
@@ -186,11 +185,14 @@ impl<T> BinaryExpression<T> {
     /// # Example
     ///
     /// ```rust
-    /// use iceberg::expr::Datum;
-    /// use iceberg::expr::PredicateOperator;
-    /// use iceberg::expr::Reference;
+    /// use iceberg::expr::{BinaryExpression, PredicateOperator, Reference};
+    /// use iceberg::spec::Datum;
     ///
-    /// BinaryExpression::new(PredicateOperator::LessThanOrEq, Reference::new("a"), Datum::int(10);
+    /// BinaryExpression::new(
+    ///     PredicateOperator::LessThanOrEq,
+    ///     Reference::new("a"),
+    ///     Datum::int(10),
+    /// );
     /// ```
     pub fn new(op: PredicateOperator, term: T, literal: Datum) -> Self {
         debug_assert!(op.is_binary());