question: public static void maybeQuote2 ( int version , StringBuffer buf , String value ) { if ( value == null || value . length ( ) == 0 ) { buf . append ( "\"\"" ) ; } else if ( containsCTL ( value , version ) ) throw new IllegalArgumentException ( "Control character in cookie value, consider BASE64 encoding your value" ) ; else if ( alreadyQuoted ( value ) ) { buf . append ( '"' ) ; buf . append ( escapeDoubleQuotes ( value , 1 , value . length ( ) - 1 ) ) ; buf . append ( '"' ) ; } else if ( version == 0 && ! isToken ( value ) ) { buf . append ( '"' ) ; buf . append ( escapeDoubleQuotes ( value , 0 , value . length ( ) ) ) ; buf . append ( '"' ) ; } else if ( version == 1 && ! isToken2 ( value ) ) { buf . append ( '"' ) ; buf . append ( escapeDoubleQuotes ( value , 0 , value . length ( ) ) ) ; buf . append ( '"' ) ; } else { buf . append ( value ) ; } }
target:  Quotes values using rules that vary depending on Cookie version.