return Pattern.quote(s.substring(0, s.length() - 1)) + "$";
        }
        return Pattern.quote(s);
    }

    /**
     * Unescapes double backslashes in regex patterns.
     * Converts escaped backslashes (\\) back to single backslashes (\).
     *
     * @param s the string to unescape
     * @return the unescaped string
     */
    protected String unescape(final String s) {

#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
#   set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse

        discloser.setSubject("Subject with \\ backslash");
        discloser.setPlainText("Content with \\ backslash");

        String result = notificationHelper.toSlackMessage(discloser);

        assertNotNull(result);
        assertTrue(result.contains("Subject with"));
        assertTrue(result.contains("Content with"));
        assertTrue(result.contains("backslash"));
    }

     */
    @Required
    public MultipartFormFile designFile;

    /**
     * The name for the design file being uploaded.
     * Must not contain invalid file system characters like backslash, colon, asterisk, etc.
     */
    @Pattern(regexp = "^[^\\\\|/|:|\\*|?|\"|<|>|\\|]+$", message = "{errors.design_file_name_is_invalid}")
    public String designFileName;

    /**

        params.put("quotes", "text with \"quotes\"");
        params.put("backslash", "text\\with\\backslash");
        activityHelper.print("test", OptionalThing.empty(), params);
        String result = localLogMsg.get();
        assertTrue(result.contains("\\\"quotes\\\""));
        assertTrue(result.contains("text\\\\with\\\\backslash"));
    }

    static class TestLoginCredential implements LoginCredential {

        assertEquals("${var1value2}", ResourceUtil.resolve(value));

        // Test with special characters in replacement
        System.setProperty("special", "value$with\\backslash");
        value = "${special}";
        assertEquals("value$with\\backslash", ResourceUtil.resolve(value));

        // Test with numeric property names
        System.setProperty("123", "numeric");
        value = "${123}";

        super.tearDown();
    }

    private String getTestContent() {
        return "# This is a comment\n" + "test1\n" + "test2\n" + "test3\n" + "\n" + // empty line
                "test\\\\4\n" + // escaped backslash
                "test5\n";
    }

    public void test_getType() {
        assertEquals("protwords", protwordsFile.getType());
    }

    public void test_getPath() {

        monitorTarget.append(buf, "specialKey", supplier);
        assertEquals("\"specialKey\":\"test \\\"quotes\\\" and \\n newline\"", buf.toString());
    }

    // Test append method with String containing backslash
    public void test_append_stringWithBackslash() {
        StringBuilder buf = new StringBuilder();
        Supplier<Object> supplier = () -> "path\\to\\file";

        monitorTarget.append(buf, "pathKey", supplier);

    }

    /**
     * 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
     */

    }

    public void test_unescape_withBackslash() {
        String content = "word\\n1\n" + // word + n + 1
                "word\\\n"; // word + (nothing after backslash)

        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
        stopwordsFile.reload(null, is);

        assertEquals(2, stopwordsFile.stopwordsItemList.size());