* The file is newline separated. The first two lines are the URL and the request method. Next
     * is the number of HTTP Vary request header lines, followed by those lines.
     *
     * Next is the response status line, followed by the number of HTTP response header lines,
     * followed by those lines.
     *
     * HTTPS responses also contain SSL session information. This begins with a blank line, and then

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                // Remove comments
                final String replacedLine = line.replaceAll("#.*$", StringUtil.EMPTY).trim();

                // Skip empty lines or comment lines
                if (replacedLine.length() == 0) {
                    if (updater != null) {

    else -> skip(newline + 1)
  }
}

/**
 * Reads lines from `IdnaMappingTable.txt`.
 *
 * Comment lines are either blank or start with a `#` character. Lines may also end with a comment.
 * All comments are ignored.
 *
 * Regular lines contain fields separated by semicolons.
 *
 * The first element on each line is a single hex code point (like 0041) or a hex code point range
 * (like 0030..0039).
 *

            final String[] lines = value.split("[\r\n]");
            for (final String line : lines) {
                if (StringUtil.isNotBlank(line)) {
                    final int pos = line.indexOf('=');
                    if (pos == 0) {
                        paramMap.put("unknown." + (unknownKey + 1), line.substring(pos + 1).trim());
                        unknownKey++;

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                // Remove comments
                final String replacedLine = line.replaceAll("#.*$", StringUtil.EMPTY).trim();

                // Skip empty lines or comment lines
                if (replacedLine.length() == 0) {
                    if (updater != null) {

    }
  }

  /**
   * Reads the first line from a file. The line does not include line-termination characters, but
   * does include other leading and trailing whitespace.
   *
   * @param file the file to read from
   * @param charset the charset used to decode the input stream; see {@link StandardCharsets} for
   *     helpful predefined constants
   * @return the first line, or null if the file is empty

    assertEquals(TEXT, CharStreams.toString(new StringReader(TEXT)));
  }

  public void testReadLines() throws IOException {
    List<String> lines = CharStreams.readLines(new StringReader("a\nb\nc"));
    assertEquals(ImmutableList.of("a", "b", "c"), lines);
  }

  public void testReadLines_withLineProcessor() throws IOException {
    String text = "a\nb\nc";

    // Test a LineProcessor that always returns false.

    assertEquals(TEXT, CharStreams.toString(new StringReader(TEXT)));
  }

  public void testReadLines() throws IOException {
    List<String> lines = CharStreams.readLines(new StringReader("a\nb\nc"));
    assertEquals(ImmutableList.of("a", "b", "c"), lines);
  }

  public void testReadLines_withLineProcessor() throws IOException {
    String text = "a\nb\nc";

    // Test a LineProcessor that always returns false.

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments
                }

            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (line.length() == 0 || line.charAt(0) == '#') {
                    if (updater != null) {
                        updater.write(line);
                    }
                    continue; // ignore empty lines and comments
                }