clippy

Author: alamb

datafusion/optimizer/src/simplify_expressions/udf_preimage.rs

@@ -141,7 +141,7 @@ mod test {
         }
 
         fn column_expr(&self, args: &[Expr]) -> Option<Expr> {
-            args.get(0).cloned()
+            args.first().cloned()
         }
     }