Fix clippy lint on rust 1.86 (#1796)

src/ast/ddl.rs

@@ -868,7 +868,7 @@ impl fmt::Display for AlterColumnOperation {
             AlterColumnOperation::SetDefault { value } => {
                 write!(f, "SET DEFAULT {value}")
             }
-            AlterColumnOperation::DropDefault {} => {
+            AlterColumnOperation::DropDefault => {
                 write!(f, "DROP DEFAULT")
             }
             AlterColumnOperation::SetDataType { data_type, using } => {

src/ast/mod.rs

@@ -7617,7 +7617,7 @@ impl fmt::Display for CopyTarget {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         use CopyTarget::*;
         match self {
-            Stdin { .. } => write!(f, "STDIN"),
+            Stdin => write!(f, "STDIN"),
             Stdout => write!(f, "STDOUT"),
             File { filename } => write!(f, "'{}'", value::escape_single_quote_string(filename)),
             Program { command } => write!(

src/dialect/snowflake.rs

@@ -1038,14 +1038,13 @@ fn parse_session_options(
             }
         }
     }
-    options
-        .is_empty()
-        .then(|| {
+    if options.is_empty() {
         Err(ParserError::ParserError(
             "expected at least one option".to_string(),
         ))
-        })
-        .unwrap_or(Ok(options))
+    } else {
+        Ok(options)
+    }
 }
 
 /// Parses options provided within parentheses like:

tests/sqlparser_common.rs

@@ -14091,8 +14091,7 @@ fn test_table_sample() {
 
 #[test]
 fn overflow() {
-    let expr = std::iter::repeat("1")
-        .take(1000)
+    let expr = std::iter::repeat_n("1", 1000)
         .collect::<Vec<_>>()
         .join(" + ");
     let sql = format!("SELECT {}", expr);