*
         * This method reads characters from the reader and processes them according to the following rules:
         * - ISO control characters and space characters are treated as spaces.
         * - Alphanumeric characters (0-9, A-Z, a-z) are appended to the buffer.
         * - Symbol characters (!-/, :-@, [-`, {-~) are appended to the buffer.

        // Test common special characters
        assertTrue(CharUtil.isUrlChar('.'));
        assertTrue(CharUtil.isUrlChar('-'));
        assertTrue(CharUtil.isUrlChar('*'));
        assertTrue(CharUtil.isUrlChar('_'));
    }

    public void test_isUrlChar_urlSpecialChars() {
        // Test URL-specific special characters
        assertTrue(CharUtil.isUrlChar(':'));

 *
 * This class provides methods to escape special characters in XML strings,
 * strip invalid XML characters, and parse XML content into a map of data.
 *
 * <p>
 * The class is final and cannot be instantiated.
 * </p>
 *
 * <h2>Methods:</h2>
 * <ul>
 *   <li>{@link #escapeXml(String)}: Escapes special characters in an XML string.</li>

import org.apache.commons.lang3.StringUtils;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.dict.DictionaryItem;

/**
 * Represents a single character mapping rule that defines how input characters are mapped to output characters
 * for text analysis and search processing. This class is used in character mapping dictionaries to transform
 * text during indexing and search operations.
 *

 * half-width Katakana characters (Hankaku Kana) to full-width Katakana characters (Zenkaku Kana).
 * It also handles the conversion of voiced and semi-voiced sound marks.
 *
 * <p>This class provides the following functionalities:</p>
 * <ul>
 *   <li>Normalization of a string containing Hankaku Kana to Zenkaku Kana.</li>
 *   <li>Conversion of individual Hankaku Kana characters to Zenkaku Kana characters.</li>

            assertTrue("Error message should contain 'text content'", message.contains("text content"));
        }
    }

    /**
     * Test extraction with special characters and control characters.
     */
    public void test_getText_withSpecialCharacters_handlesCorrectly() {
        final String specialContent = "Tab\there\nNewline\rCarriage return\0Null byte";

     */
    private String thumbnailLoc;

    /**
     * The title of the video.
     * Maximum 100 characters.
     */
    private String title;

    /**
     * The description of the video.
     * Maximum 2048 characters.
     */
    private String description;

    /**
     * A URL pointing to the actual video media file.
     * Must be one of the supported formats.

        /**
         * Compiles a robots.txt path pattern into a regular expression pattern.
         * According to RFC 9309:
         * - '*' matches any sequence of characters (including the empty sequence)
         * - '$' matches the end of the URL path
         * - All other characters are matched literally
         *
         * @param pattern the robots.txt path pattern
         * @return the compiled Pattern object
         */

   :

# Case 13: Numeric crawl-delay edge cases
User-agent: NumericBot
Crawl-delay: 0
Crawl-delay: 999999999
Crawl-delay: 1.23e10

# Case 14: Tab characters instead of spaces
User-agent:	TabBot
Disallow:	/tab1/
Allow:	/tab2/

# Case 15: Unicode and special characters in user-agent
User-agent: Bot™
Disallow: /trademark/

User-agent: Bot®
Disallow: /registered/

# Case 16: Multiple wildcards user agent

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

This specific regular expression pattern checks that the received parameter value:

* `^`: starts with the following characters, doesn't have characters before.