code: protected String cleanDocumentationContent( String content ) {
          Pattern REMOVE_WHITESPACE_AND_LINE_FEEDS_PATTERN = Pattern.compile("[\\n\\r\\s]+");
          Matcher matcher = REMOVE_WHITESPACE_AND_LINE_FEEDS_PATTERN.matcher(content);
          return matcher.replaceAll(" ");
      }
docs: This method is used by the {@link #processDocumentation(WSDLElement, Node)} to clean up the documentation content string.
  By default, this method replaces all line feeds, carriage returns, and sequences of multiple whitespace with a single
  space.
  
  @param content the original content as read from the definition; never null
  @return the cleaned content; may be null if the content contained useless information