am 221c9552: AI 148972: fix link to the installing guide to 1.5;   fix a couple layout bugs in the document.   BUG=1860640

Merge commit '221c95526d3e3e23288478b6dd2d24b5ec7e97d5' into donut

* commit '221c95526d3e3e23288478b6dd2d24b5ec7e97d5':
  AI 148972: fix link to the installing guide to 1.5;