}
        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) {
        return s.replace("\\\\", "\\");
    }

    /**

        // 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

                        inputs[i] = unescape(inputStrings.get(i)).trim();
                    }

                    final List<String> outputStrings = split(sides.get(1), ",");
                    outputs = new String[outputStrings.size()];
                    for (int i = 0; i < outputs.length; i++) {
                        outputs[i] = unescape(outputStrings.get(i)).trim();
                    }

    }

    @Test
    public void test_unescape() {
        GsaConfigParser parser = new GsaConfigParser();

        assertEquals("test\\", parser.unescape("test\\\\"));
        assertEquals("test", parser.unescape("test"));
        assertEquals("\\", parser.unescape("\\\\"));
    }

    @Test
    public void test_appendFilterPath() {
        GsaConfigParser parser = new GsaConfigParser();

                    }
                    continue; // ignore empty lines and comments
                }

                final String inputStrings = line;
                final String input = unescape(inputStrings);

                if (input.length() > 0) {
                    id++;
                    final ProtwordsItem item = new ProtwordsItem(id, input);
                    if (updater != null) {

                    }
                    continue; // ignore empty lines and comments
                }

                final String inputStrings = line;
                final String input = unescape(inputStrings);

                if (input.length() > 0) {
                    id++;
                    final StopwordsItem item = new StopwordsItem(id, input);
                    if (updater != null) {

            // Verify escaped pattern matches
            assertTrue("Escaped pattern should match: " + mimeType, Pattern.compile(escapedPattern).matcher(mimeType).matches());

            // Verify unescaped pattern does NOT match
            assertFalse("Unescaped pattern should NOT match: " + mimeType, Pattern.compile(mimeType).matcher(mimeType).matches());
        }
    }

    @Test

        assertTrue(result.contains("StopwordsFile"));
        assertTrue(result.contains("path=" + testFile.getAbsolutePath()));
        assertTrue(result.contains("id=test_id"));
    }

    // Test unescape private method through reload
    @Test
    public void test_unescape_noBackslash() {
        String content = "word1\n";
        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));

- Check property file encoding (should be UTF-8 or use Unicode escapes `\uXXXX`)
- Verify property keys match exactly with base English files

### Build errors after regeneration

- Check property file syntax (no unescaped special characters)
- Ensure all property values are properly escaped
- Run `mvn clean` before rebuilding

## Additional Resources

- Fess Configuration: `src/main/resources/fess_config.properties`