}
        if (escaped.length > 0) {
          System.arraycopy(escaped, 0, dest, destIndex, escaped.length);
          destIndex += escaped.length;
        }
        // If we dealt with an escaped character, reset the unescaped range.
        unescapedChunkStart = nextIndex;
      }
      index = nextEscapeIndex(s, nextIndex, end);
    }

    // Process trailing unescaped characters - no need to account for escaped

        }
        if (escaped.length > 0) {
          System.arraycopy(escaped, 0, dest, destIndex, escaped.length);
          destIndex += escaped.length;
        }
        // If we dealt with an escaped character, reset the unescaped range.
        unescapedChunkStart = nextIndex;
      }
      index = nextEscapeIndex(s, nextIndex, end);
    }

    // Process trailing unescaped characters - no need to account for escaped

        String[] result;

        // Escaped quotes within quoted value - DOES NOT get unquoted because pattern doesn't match
        value = "\"value with \"\"escaped\"\" quotes\"";
        result = KuromojiCSVUtil.parse(value);
        assertEquals(1, result.length);
        assertEquals("\"value with \"\"escaped\"\" quotes\"", result[0]);

    }

    /**
     * Escapes specific characters in a query string.
     * Replaces each specified character with its escaped version (prefixed with backslash).
     *
     * @param q the query string to escape
     * @param values the characters to escape
     * @return the escaped query string
     */
    protected String escape(final String q, final String... values) {
        String value = q;

        assertTrue(result.contains("quotes"));
        assertTrue(result.contains("content"));
        assertTrue(result.contains("newlines"));
        assertTrue(result.contains("tabs"));
        // JSON should be properly escaped
        assertTrue(result.contains("Test"));
    }

    public void test_toSlackMessage_withWhitespaceContent() {
        MockSMailPostingDiscloser discloser = new MockSMailPostingDiscloser();

http://%ef%bc%85%ef%bc%94%ef%bc%91.com

# ...%00 in fullwidth should fail (also as escaped UTF-8 input)
http://\uff05\uff10\uff10.com
http://%ef%bc%85%ef%bc%90%ef%bc%90.com

# Basic IDN support, UTF-8 and UTF-16 input should be converted to IDN
http://\u4f60\u597d\u4f60\u597d  s:http p:/ h:xn--6qqa088eba

# Invalid escaped characters should fail and the percents should be
# escaped. https://www.w3.org/Bugs/Public/show_bug.cgi?id=24191
http://%zz%66%a.com

    }

    public void test_unescape() throws Exception {
        // Test with escaped characters (backslash sequences)
        String content = "test\\t1\n" + // escaped tab sequence
                "test\\n2\n" + // escaped newline sequence
                "test3\n"; // no escape

        // Write content to test file
        writeTestFile(content);

        // Reload the file

});
```

### Text Processing and JSON
```java
import org.codelibs.core.text.*;

// JSON utilities with proper escaping
String escaped = JsonUtil.escape("Hello \"World\" with special chars");
String unescaped = JsonUtil.unescape(escaped);

// Text tokenization
Tokenizer tokenizer = new Tokenizer("field1,field2,field3", ",");
while (tokenizer.hasMoreTokens()) {

    }

    public void test_escapeValue() {
        String input = "test\twith\ttabs";
        String escaped = crawlerStatsHelper.escapeValue(input);
        assertEquals("test with tabs", escaped);
        assertFalse(escaped.contains("\t"));
    }

    public void test_statsKeyObjectWithoutUrl() {
        StatsKeyObject key = new StatsKeyObject("test_id");

  private static String escapeAndQuote(String value) {
    StringBuilder escaped = new StringBuilder(value.length() + 16).append('"');
    for (int i = 0; i < value.length(); i++) {
      char ch = value.charAt(i);
      if (ch == '\r' || ch == '\\' || ch == '"') {
        escaped.append('\\');
      }
      escaped.append(ch);
    }
    return escaped.append('"').toString();
  }