message: fix REDAME.md
diff: @@ -80,7 +80,8 @@ One million downloads! This project won't be successful without contributions fr
  <img src="demo_media/auto item.gif" alt="auto \item demo" height="80px">
  -- Preview on hover. Hovering over the start or end tags of a maths environment causes a mathjax preview to pop up.
  +- Preview on hover. Hovering over the start tag of a math environment causes a mathjax preview to pop up.
  +
  <img src="demo_media/hover.gif" alt="auto \item demo" height="120px">
  ## Requirements
  