code: private void cleanContentLeadingSpaces()
      {
          if (getContent().length() > 0) {
              if (fPreviousInlineText.length() == 0
                  || fPreviousInlineText
                  .charAt(fPreviousInlineText.length() - 1) == ' ')
              {
                  trimLeadingWhiteSpaces();
              }
          }
      }
docs: UC1: Any white spaces group is removed if it's before a non inline
  element or at the begining of the document.
  <p>
  UC3: Remove leading spaces of content if previous inline text already
  ends with a space.