bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");

    bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");

		n++
	} else {
		n, err = rr.reader.Read(p)
	}

	if err != nil {
		return n, err
	}

	// Do nothing if record-delimiter is already newline.
	if string(rr.recordDelimiter) == "\n" {
		return n, nil
	}

	// Change record delimiters to newline.
	if len(rr.recordDelimiter) == 1 {
		for idx := 0; idx < len(p); {
			i := bytes.Index(p[idx:], rr.recordDelimiter)
			if i < 0 {
				break
			}

      val length = logMessage.length
      while (i < length) {
        var newline = logMessage.indexOf('\n', i)
        newline = if (newline != -1) newline else length
        do {
          val end = minOf(newline, i + MAX_LOG_LENGTH)
          Log.println(logLevel, tag, logMessage.substring(i, end))
          i = end
        } while (i < newline)
        i++
      }
    }
  }

        }

        -1 -> {
          val lineEnd = source.indexOfElement(CRLF)
          if (lineEnd != -1L) {
            // Skip the line and newline
            source.skip(lineEnd)
            source.select(options)
          } else {
            return false // No more newlines.
          }
        }

        else -> throw AssertionError()
      }
    }
  }

  @Throws(IOException::class)

import (
	"iter"
	"unicode"
	"unicode/utf8"
)

// Lines returns an iterator over the newline-terminated lines in the byte slice s.
// The lines yielded by the iterator include their terminating newlines.
// If s is empty, the iterator yields no lines at all.
// If s does not end in a newline, the final yielded line will not end in a newline.
// It returns a single-use iterator.
func Lines(s []byte) iter.Seq[[]byte] {

			if len(s.buf) >= s.maxTokenSize || len(s.buf) > maxInt/2 {
				s.setErr(ErrTooLong)
				return false
			}
			newSize := len(s.buf) * 2
			if newSize == 0 {
				newSize = startBufSize
			}
			newSize = min(newSize, s.maxTokenSize)
			newBuf := make([]byte, newSize)
			copy(newBuf, s.buf[s.start:s.end])
			s.buf = newBuf
			s.end -= s.start
			s.start = 0
		}

  private static final ImmutableMap<Character, String> NO_REPLACEMENTS = ImmutableMap.of();
  private static final ImmutableMap<Character, String> SIMPLE_REPLACEMENTS =
      ImmutableMap.of(
          '\n', "<newline>",
          '\t', "<tab>",
          '&', "<and>");
  private static final char[] NO_CHARS = new char[0];

  public void testReplacements() throws IOException {

				acceptArg = false
			default:
				in.Error("bad definition for macro:", name)
			}
		}
	}
	var tokens []Token
	// Scan to newline. Backslashes escape newlines.
	for tok != '\n' {
		if tok == scanner.EOF {
			in.Error("missing newline in definition for macro:", name)
		}
		if tok == '\\' {
			tok = in.Stack.Next()
			if tok != '\n' && tok != '\\' {

      with(sink) {
        writeInt(totalRuleBytes)
        for (domain in sortedRules) {
          write(domain).writeByte(NEWLINE)
        }
        writeInt(totalExceptionRuleBytes)
        for (domain in sortedExceptionRules) {
          write(domain).writeByte(NEWLINE)
        }
      }
    }
  }

  private suspend fun writeOutputFile(importResults: ImportResults) =