* the operating system's default line separator. This method is equivalent to {@code
   * writeLines(lines, System.getProperty("line.separator"))}.
   *
   * @throws IOException if an I/O error occurs while writing to this sink
   */
  public void writeLines(Iterable<? extends CharSequence> lines) throws IOException {
    writeLines(lines, System.getProperty("line.separator"));
  }

  /**

    assertFalse(in.closed());
  }

  public void testWriteLines_withSpecificSeparator() throws IOException {
    sink.writeLines(ImmutableList.of("foo", "bar", "baz"), "\n");
    assertEquals("foo\nbar\nbaz\n", sink.getString());
  }

  public void testWriteLines_withDefaultSeparator() throws IOException {
    sink.writeLines(ImmutableList.of("foo", "bar", "baz"));
    String separator = System.getProperty("line.separator");

                    permalinks.add(slug)

                    line = f"{hashes} {title} {{ #{slug} }}\n"

        updated_lines.append(line)

    with path.open("w", encoding="utf-8") as f:
        f.writelines(updated_lines)


@app.command()
def add_permalinks_pages(pages: list[Path], update_existing: bool = False) -> None:
    """
    Add or update header permalinks in specific pages of En docs.
    """

            prompter.showMessage(line);
        } catch (org.apache.maven.api.services.PrompterException e) {
            throw new IOException("Unable to prompt", e);
        }
    }

    @Override
    public void writeLine(String line) throws IOException {
        try {
            prompter.showMessage(line + System.lineSeparator());
        } catch (org.apache.maven.api.services.PrompterException e) {