public void writeLines(Stream<? extends CharSequence> lines, String lineSeparator)
      throws IOException {
    writeLines(lines.iterator(), lineSeparator);
  }

  private void writeLines(Iterator<? extends CharSequence> lines, String lineSeparator)
      throws IOException {
    checkNotNull(lineSeparator);

    try (Writer out = openBufferedStream()) {
      while (lines.hasNext()) {

        }

        String lineSeparator = Os.isFamily(Os.FAMILY_WINDOWS) ? "\\\\r\\\\n" : "\\\\n";
        String licenseHeader = null;
        try {
            licenseHeader = readFileToString(licenseHeaderFile, "UTF-8").replace(System.lineSeparator(), lineSeparator);
        } catch (IOException e) {
            throw new GradleException("Cannot configure eclipse", e);

        StringWriter sWriter = new StringWriter();
        PrintWriter pWriter = new PrintWriter(sWriter);

        error.printStackTrace(pWriter);

        System.err.println("[error] " + content + System.lineSeparator() + System.lineSeparator() + sWriter);
    }

    /**
     * @see org.apache.maven.plugin.logging.Log#error(java.lang.Throwable)
     */
    @Override
    public void error(Throwable error) {

        super("Goal: " + goal + " already exists in the plugin descriptor for prefix: " + goalPrefix
                + System.lineSeparator() + "Existing implementation is: " + existingImplementation
                + System.lineSeparator() + "Conflicting implementation is: " + newImplementation);
    }

                        className = className.substring(0, className.length() - ".java".length());
                        LOGGER.info("Inspecting " + path + System.lineSeparator()
                            + "  package: " + packageName + System.lineSeparator()
                            + "  class: " + className);
                        if (dependencyPackages.contains(packageName)) {

    String secondLine = "\\s*at " + ThrowablesTest.class.getName() + "\\..*";
    String moreLines = "(?:.*" + System.lineSeparator() + "?)*";
    String expected =
        firstLine + System.lineSeparator() + secondLine + System.lineSeparator() + moreLines;
    assertThat(getStackTraceAsString(e)).matches(expected);
  }

  public void testGetCausalChain() {

                    System.lineSeparator() + "Options:",
                    options,
                    HelpFormatter.DEFAULT_LEFT_PAD,
                    HelpFormatter.DEFAULT_DESC_PAD,
                    System.lineSeparator(),
                    false);
            pw2.flush();
            for (String s : sw.toString().split(System.lineSeparator())) {
                pw.accept(s);
            }

                    + "You have the following options to resolve this:" + System.lineSeparator()
                    + "  1. Preserve the model version by setting 'preserve.model.version=true' to generate a consumer POM with <modelVersion>4.2.0</modelVersion>, which supports mixins"
                    + System.lineSeparator()

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

class ToolchainsBuildingExceptionTest {
    private static final String LS = System.lineSeparator();

    @Test
    void testNoProblems() {
        ToolchainsBuildingException e = new ToolchainsBuildingException(Collections.emptyList());

    String secondLine = "\\s*at " + ThrowablesTest.class.getName() + "\\..*";
    String moreLines = "(?:.*" + System.lineSeparator() + "?)*";
    String expected =
        firstLine + System.lineSeparator() + secondLine + System.lineSeparator() + moreLines;
    assertThat(getStackTraceAsString(e)).matches(expected);
  }

  public void testGetCausalChain() {