docs: Fixed TOC typo and other formatting problems

TOC link was missing a needed #. While I had the file open I fixed
other formatting issues (overlong lines, code snippets that
shouldn't have been pretty-printed). No changes to the page content.

I'll build and stage (see first comment for staged doc location) but
if it looks good I'll +2 and submit it myself.

bug: 26191770
Change-Id: I3c15ed3dfaa0762729f8d778d4aa828710c0eefa