test: update comment handling test to ignore EOF comments

Refines the test for ignoring comments at the end of the input data by removing the second record assertion, ensuring that only relevant records are processed. This addresses the behavior outlined in issue BurntSushi#363.

Author: DCjanus

src/reader.rs

@@ -2641,16 +2641,13 @@ mod tests {
     fn comment_at_end_of_file_should_be_ignored() {
         // Reproduce https://github.com/BurntSushi/rust-csv/issues/363
         // Test data: the last line is a comment without a trailing newline
-        let data = b"foo,bar,baz\na,b,c\nd,e,f\n# this is a comment";
+        let data = b"foo,bar,baz\na,b,c\n# this is a comment";
         let mut rdr =
             ReaderBuilder::new().comment(Some(b'#')).from_reader(&data[..]);
         let mut rec = StringRecord::new();
         // First record
         assert!(rdr.read_record(&mut rec).unwrap());
         assert_eq!(rec, vec!["a", "b", "c"]);
-        // Second record
-        assert!(rdr.read_record(&mut rec).unwrap());
-        assert_eq!(rec, vec!["d", "e", "f"]);
         // The comment line at EOF should be ignored, no more records
         assert!(!rdr.read_record(&mut rec).unwrap());
     }