assertThat(formEncode(63)).isEqualTo("%3F")
    assertThat(formEncode(64)).isEqualTo("%40")
    assertThat(formEncode(65)).isEqualTo("A")
    assertThat(formEncode(90)).isEqualTo("Z")
    assertThat(formEncode(91)).isEqualTo("%5B")
    assertThat(formEncode(92)).isEqualTo("%5C")
    assertThat(formEncode(93)).isEqualTo("%5D")
    assertThat(formEncode(94)).isEqualTo("%5E")

  </function>

  <function>
    <description>Format a content as code.</description>
    <name>formatCode</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String formatCode(java.lang.String, java.lang.String, java.lang.String, java.lang.String)</function-signature>

     * @param mimetype the MIME type of the content (currently unused)
     * @param input the code content to format
     * @return HTML formatted code with line numbers and styling
     */
    public static String formatCode(final String prefix, final String style, final String mimetype, final String input) {
        if (input == null) {
            return StringUtil.EMPTY;
        }