Add comment why test uses a different CSVFormat

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1460369 13f79535-47bb-0310-9956-ffa450edef68

Author: britter

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

@@ -329,6 +329,7 @@ public void testEscapedCharacter() throws Exception {
     @Test
     @Ignore
     public void testEscapedControlCharacter() throws Exception {
+        // we are explicitly using an escape different from \ here, because \r is the character sequence for CR
         final Lexer lexer = getLexer("character!rEscaped", CSVFormat.newBuilder().withEscape('!').build());
         assertTokenEquals(EOF, "character!rEscaped", lexer.nextToken(new Token()));
     }