Quote value starting with comment marker in minimal quote mode (apache#610).

Extract to local variable.

Author: garydgregory

src/changes/changes.xml

@@ -56,6 +56,7 @@
       <action type="fix" dev="ggregory" due-to="OldTruckDriver, Gary Gregory" issue="CSV-326">Escape Reader values with quote and escape (#606).</action>
       <action type="fix" dev="ggregory" due-to="Dexter.k, Gary Gregory">Clear escape delimiter buffer before peek in isEscapeDelimiter (#608).</action>
       <action type="fix" dev="ggregory" due-to="Dexter.k, Gary Gregory">Escape quote char in printWithEscapes when QuoteMode is NONE (#609).</action>
+      <action type="fix" dev="ggregory" due-to="Dexter.k, Gary Gregory">Quote value starting with comment marker in minimal quote mode (#610)..</action>
       <!-- ADD -->
       <action type="add" dev="ggregory" due-to="Gary Gregory, Indy, Sylvia van Os" issue="CSV-307">Add an "Android Compatibility" section to the web site.</action>
       <action type="add" dev="ggregory" due-to="Ruiqi Dong, Gary Gregory" issue="CSV-325">Add CSVParser.Builder.setByteOffset(long) (#604).</action>

src/test/java/org/apache/commons/csv/CSVPrinterTest.java

@@ -1842,11 +1842,12 @@ void testQuoteCommentMarkerFirstChar() throws IOException {
             // The marker past the first character does not start a comment, so only the leading-marker value is quoted.
             printer.printRecord("a;b", ";c");
         }
+        final String string = sw.toString();
         assertEquals("; a real comment" + RECORD_SEPARATOR +
                 "\";comment-like\",b" + RECORD_SEPARATOR +
-                "a;b,\";c\"" + RECORD_SEPARATOR, sw.toString());
+                "a;b,\";c\"" + RECORD_SEPARATOR, string);
         // The comment is dropped on read; both data records survive intact.
-        try (CSVParser parser = CSVParser.parse(sw.toString(), format)) {
+        try (CSVParser parser = CSVParser.parse(string, format)) {
             final List<CSVRecord> records = parser.getRecords();
             assertEquals(2, records.size());
             assertEquals(col1, records.get(0).get(0));