rootvector2 opened a new pull request, #610:
URL: https://github.com/apache/commons-csv/pull/610

   `printWithQuotes` (the default `MINIMAL` quote mode) decides whether to 
encapsulate a value by special-casing only the hard-coded `#` 
(`Constants.COMMENT`) as the first character, so a configured comment marker 
greater than `#` such as `;` is left unquoted. I hit this round-tripping 
printer output back through the parser: 
`CSVFormat.DEFAULT.builder().setCommentMarker(';').get()` prints `";id", 
"name"` as `;id,name`, and re-parsing with that same format reads the line as a 
comment and silently drops the whole record.
   
   The encapsulation check is the right place to fix it, since that is already 
where the printer protects the default comment char, the delimiter, the quote 
and newlines. The change quotes a value whenever its first character equals the 
configured comment marker, so the output reads back as data.
   
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