code: public static String openTagStyle(String tag, String style, String... content) {
  		return openTag(tag, null, style, content);
  	}
docs: Build a String containing a HTML opening tag with given CSS style attribute(s) and concatenates the given
  content. Content should contain no HTML, because it is prepared with {@link #htmlEncode(String)}.
  
  @param tag String name of HTML tag
  @param style style for tag (plain CSS)
  @param content content string
  @return HTML tag element as string