Improve accuracy of supports_string_literal_concatenation_with_newline

src/parser/mod.rs

@@ -12184,6 +12184,15 @@ impl<'a> Parser<'a> {
                         after_newline = true;
                         self.next_token_no_skip();
                     }
+                    // Tokenizer includes the newline in the single line comment
+                    // so we need to check for it specifically here, otherwise the newline will
+                    // not be consumed as a separate token.
+                    Token::Whitespace(Whitespace::SingleLineComment { comment, .. }) => {
+                        if comment.ends_with('\n') {
+                            after_newline = true;
+                        }
+                        self.next_token_no_skip();
+                    }
                     Token::Whitespace(_) => {
                         self.next_token_no_skip();
                     }

tests/sqlparser_common.rs

@@ -18356,6 +18356,14 @@ fn parse_adjacent_string_literal_concatenation() {
         -- COMMENT
         'd'
     )"#;
+    dialects.one_statement_parses_to(sql, "SELECT 'abc' IN ('abc', 'd')");
+
+        let sql = r#"
+    SELECT 'abc' in ('a'
+        'b' -- COMMENT
+        'c',
+        'd'
+    )"#;
     dialects.one_statement_parses_to(sql, "SELECT 'abc' IN ('abc', 'd')");
 }