}
        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();

          destIndex += escaped.length;
        }
        // If we dealt with an escaped character, reset the unescaped range.
        unescapedChunkStart = nextIndex;
      }
      index = nextEscapeIndex(s, nextIndex, end);
    }

    // Process trailing unescaped characters - no need to account for escaped
    // length or padding the allocation.
    int charsSkipped = end - unescapedChunkStart;

                    }
                    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

private fun Buffer.startsWith(prefix: Byte): Boolean = !exhausted() && this[0] == prefix

/**
 * Reads a double-quoted string, unescaping quoted pairs like `\"` to the 2nd character in each
 * sequence. Returns the unescaped string, or null if the buffer isn't prefixed with a
 * double-quoted string.
 */
@Throws(EOFException::class)
private fun Buffer.readQuotedString(): String? {
  require(readByte() == '\"'.code.toByte())

    assertThat(spaceEscaper.escape("string with spaces")).isEqualTo("string with spaces");
  }

  /** Tests that if we add extra 'safe' characters they remain unescaped */
  public void testCustomEscaper() {
    UnicodeEscaper e = new PercentEscaper("+*/-", false);
    for (char c = 0; c < 128; c++) {
      if ((c >= '0' && c <= '9')
          || (c >= 'a' && c <= 'z')