// Test quotes are escaped.
    assertThat(xmlAttributeEscaper.escape("\"test\"")).isEqualTo(""test"");
    assertThat(xmlAttributeEscaper.escape("'test'")).isEqualTo("'test'");
    // Test all escapes
    assertThat(xmlAttributeEscaper.escape("a\"b<c>d&e\"f'"))
        .isEqualTo("a&quot;b&lt;c&gt;d&amp;e&quot;f&apos;");
    // Test '\t', '\n' and '\r' are escaped.

        // Test that MIME type patterns work correctly as regex
        // This verifies the fix for SVG thumbnail generation issue
        // where image/svg+xml was not matching due to unescaped + character

        // SVG MIME type - the + must be escaped in regex
        String svgMimetype = "image/svg+xml";
        String svgPatternWrong = "image/svg+xml"; // Wrong: + means "one or more" in regex

            logger.warn("Failed to render markdown, returning escaped plain text. error={}", e.getMessage());
            // Fallback to escaped plain text
            return escapeHtml(markdown);
        }
    }

    /**
     * Escapes HTML special characters for safe display.
     *
     * @param text the text to escape
     * @return HTML-escaped text
     */
    private String escapeHtml(final String text) {

 * {@code char} value. An additional safe range is provided that determines whether {@code char}
 * values without specific replacements are to be considered safe and left unescaped or should be
 * escaped in a general way.
 *
 * <p>A good example of usage of this class is for Java source code escaping where the replacement
 * array contains information about special ASCII characters such as {@code \\t} and {@code \\n}

 * UTF-8.
 *
 * <p><b>Note:</b> This escaper produces <a
 * href="https://url.spec.whatwg.org/#percent-encode">uppercase</a> hexadecimal sequences.
 *
 * @author David Beaumont
 * @since 15.0
 */
@GwtCompatible
public final class PercentEscaper extends UnicodeEscaper {

  // In some escapers spaces are escaped to '+'
  private static final char[] plusSign = {'+'};

          }
        };
    EscaperAsserts.assertBasic(escaper);
    assertThat(escaper.escape("\tFish & Chips\n")).isEqualTo("<tab>Fish <and> Chips<newline>");

    // Verify that everything else is left unescaped.
    String safeChars = "\0\u0100\uD800\uDC00\uFFFF";
    assertThat(escaper.escape(safeChars)).isEqualTo(safeChars);

    // Ensure that Unicode escapers behave correctly wrt badly formed input.

     * is that in JavaScript, a single quote must be escaped.</p>
     *
     * <p>Example:</p>
     * <pre>
     * input string: He didn't say, "Stop!"
     * output string: He didn't say, \"Stop!\"
     * </pre>
     *
     *
     * @param str  String to escape values in, may be null
     * @return String with escaped values, <code>null</code> if null string input
     */

     * is that in JavaScript, a single quote must be escaped.</p>
     *
     * <p>Example:</p>
     * <pre>
     * input string: He didn't say, "Stop!"
     * output string: He didn't say, \"Stop!\"
     * </pre>
     *
     *
     * @param str  String to escape values in, may be null
     * @return String with escaped values, <code>null</code> if null string input
     */

turn a.split(d,function(c){var d=new RegExp(a.isNumeric(c)?c:"\\"+c,"g");b=b.replace(d,"")}),b},escape:function(b,c){var d=c.valAttr("is-escaped"),e={"<":"__%AMP%__lt;",">":"__%AMP%__gt;","&":"__%AMP%__amp;","'":"__%AMP%__#8217;",'"':"__%AMP%__quot;"};return"yes"===d?b:(c.valAttr("is-escaped","yes"),c.one("keyup",function(a){9!==a.keyCode&&c.valAttr("is-escaped","no")}),a.each(e,function(a,c){b=b.replace(new RegExp(a,"g"),c)}),b.replace(new RegExp("__%AMP%__","g"),"&"))}},e=function(b,e,f){e||(e...

 * code point. An additional safe range is provided that determines whether code points without
 * specific replacements are to be considered safe and left unescaped or should be escaped in a
 * general way.
 *
 * <p>A good example of usage of this class is for HTML escaping where the replacement array
 * contains information about the named HTML entities such as {@code &amp;} and {@code &quot;} while