TestCharSource lines = new TestCharSource(LINES);
    assertEquals("foo", lines.readFirstLine());
    assertTrue(lines.wasStreamOpened() && lines.wasStreamClosed());
  }

  public void testReadLines_toList() throws IOException {
    TestCharSource lines = new TestCharSource(LINES);
    assertEquals(ImmutableList.of("foo", "bar", "baz", "something"), lines.readLines());

		"SYS_GID_MAX": &l.maxGID,
	}
	lines := strings.Split(file, "\n")
	for i, line := range lines {
		for k, v := range mapping {
			// A line must start with one of the definitions
			if !strings.HasPrefix(line, k) {
				continue
			}
			line = strings.TrimPrefix(line, k)
			line = strings.TrimSpace(line)
			val, err := strconv.ParseInt(line, 10, 64)
			if err != nil {

	"fmt"
	"internal/testenv"
	"runtime"
	"testing"
)

// The tests in this file test the function start line metadata included in
// _func and inlinedCall. TestStartLine hard-codes the start lines of functions
// in this file. If code moves, the test will need to be updated.
//
// The "start line" of a function should be the line containing the func
// keyword.

func normalFunc() int {
	return callerStartLine(false)
}

	switch x := 0; x {
	case 1:
		use(x)
		use(x)  // followed by an empty line

	case 2:  // followed by an empty line

		use(x)  // followed by an empty line

	case 3:  // no empty lines
		use(x)
		use(x)
	}

	switch x {
	case 0:
		use(x)
	case 1:  // this comment should have no effect on the previous or next line
		use(x)
	}

	switch x := 0; x {
	case 1:
		x = 0

    }

    // Splits into lines.
    SmallVector<StringRef, 8> lines;
    file->getBuffer().split(lines, "\n", -1, false);
    // The resize method is used since split operator puts tail value in the end
    // without splitting the leftovers.
    if (op.getVocabSize() != -1) lines.resize(op.getVocabSize());

    // Map each line to line number, starting from zero.
    SmallVector<int64_t, 8> line_nums;

// input-processing callbacks on whole lines or (for long lines that
// have been split) line fragments.
//
// It should be initialized with b set to a buffer of length 0 but non-zero capacity,
// and line and part set to the desired input processors.
// The lineBuffer will call line(x) for any whole line x (including the final newline)
// that fits entirely in cap(b). It will handle input lines longer than cap(b) by

		return
	}
	peek, _ := r.R.Peek(s)
	for len(peek) > 0 && n < 1000 {
		var line []byte
		line, peek, _ = bytes.Cut(peek, nl)
		if len(line) == 0 || (len(line) == 1 && line[0] == '\r') {
			// Blank line separating headers from the body.
			break
		}
		if line[0] == ' ' || line[0] == '\t' {
			// Folded continuation of the previous line.
			continue
		}
		n++
	}
	return n
}

        def lines = new ArrayList(LockFileReaderWriter.LOCKFILE_HEADER_LIST)
        if (modules.isEmpty()) {
            lines.add("empty=$configuration")
        } else {
            lines.addAll modules.toSorted().collect({ "$it=$configuration".toString() })
            lines.add("empty=")
        }
        lockFile.writelns(lines)
    }

		base.Fatalf("go: reading go env config: %v", err)
	}
	lines := strings.SplitAfter(string(data), "\n")
	if lines[len(lines)-1] == "" {
		lines = lines[:len(lines)-1]
	} else {
		lines[len(lines)-1] += "\n"
	}
	return lines
}

func updateEnvFile(add map[string]string, del map[string]bool) {
	lines := readEnvFileLines(len(add) == 0)

	}
}

// wrap wraps words into lines of at most max runes,
// minimizing the sum of the squares of the leftover lengths
// at the end of each line (except the last, of course),
// with a preference for ending lines at punctuation (.,:;).
//
// The returned slice gives the indexes of the first words
// on each line in the wrapped text with a final entry of len(words).
// Thus the lines are words[seq[0]:seq[1]], words[seq[1]:seq[2]],