code: public Builder tag(String tag, String attributes) {
          ends.push("</" + tag + ">");
          html.a('<').a(tag).sp().a(attributes).a('>');
          return this;
      }
docs: Starts an HTML tag. It has no effect on the plain text version.
  
  @param tag      the tag name
  @param attributes attributes full text, like "style='color:red'"
  @return this builder