throws IOException {
    checkNotNull(lineSeparator);

    try (Writer out = openBufferedStream()) {
      while (lines.hasNext()) {
        out.append(lines.next()).append(lineSeparator);
      }
    }
  }

  /**
   * Writes all the text from the given {@link Readable} (such as a {@link Reader}) to this sink.

            buf.append(e.getKey()).append(": ");
            try {
                buf.append(e.getValue().get());
            } catch (final Exception ex) {
                logger.warn("Failed to process {} task.", e.getKey(), ex);
                buf.append(ex.getMessage());
            }
            buf.append('\n');
        });
        return buf.toString();
    }

            buffer.append("[");
            for (Item item : this) {
                if (buffer.length() > 1) {
                    buffer.append(", ");
                }
                if (item instanceof ListItem) {
                    buffer.append(((ListItem) item).toListString());
                } else {
                    buffer.append(item);
                }
            }

                            map.put(ExtractData.RESOURCE_NAME_KEY, filename);
                            buf.append(extractor.getText(new IgnoreCloseInputStream(is), map).getContent());
                            buf.append('\n');
                        } catch (final Exception e) {
                            if (logger.isDebugEnabled()) {

            char ch = s.charAt(pos);
            pos++;
            if (ch == '\\') {
                sb.append(ch);
                if (pos >= end) {
                    break; // ERROR, or let it go?
                }
                ch = s.charAt(pos);
                pos++;
            }

            sb.append(ch);
        }

        if (sb.length() > 0) {
            list.add(sb.toString());
        }

		if err != nil {
			errs = append(errs, fmt.Errorf("Unable to apply heal config: %w", err))
		} else {
			globalHealConfig.Update(healCfg)
		}
	case config.BatchSubSys:
		batchCfg, err := batch.LookupConfig(s[config.BatchSubSys][config.Default])
		if err != nil {
			errs = append(errs, fmt.Errorf("Unable to apply batch config: %w", err))
		} else {

				if idx.Where == "" {
					idx.Where = index.Where
				}
				if idx.Comment == "" {
					idx.Comment = index.Comment
				}
				if idx.Option == "" {
					idx.Option = index.Option
				}

				idx.Fields = append(idx.Fields, index.Fields...)
				sort.Slice(idx.Fields, func(i, j int) bool {
					return idx.Fields[i].priority < idx.Fields[j].priority
				})

				indexes[index.Name] = idx
			}
		}
	}

            # new_section = Section(title=new_title, children=new_children)
            item.title = new_title
            item.children = new_children
            new_items.append(item)
        else:
            new_items.append(item)
    return new_items


def on_nav(
    nav: Navigation, *, config: MkDocsConfig, files: Files, **kwargs: Any
) -> Navigation:

                if (c == ' ') {
                    buf.append("%20");
                } else {
                    final String str = String.valueOf(c);
                    if (StringUtil.isAsciiPrintable(str)) {
                        buf.append(c);
                    } else {
                        buf.append(URLEncoder.encode(str, charset));
                    }
                }
            }

			if err != nil {
				t.Fatalf("unable to get multiple items; %v", err)
			}
			resultItems = append(resultItems, items...)
			continue
		}
		item, err := store.Get(key)
		if err != nil {
			t.Fatalf("unable to get item; %v", err)
		}
		resultItems = append(resultItems, item)
	}

	if !reflect.DeepEqual(resultItems, items) {