am 24bbcd50: (-s ours) DO NOT MERGE cherrypick from jb-devChange-Id: I6eb11d3629dd13d2c7ac297cc9fa3828ed59f170 add style for code captions; ignore sidenav headers for HRs

* commit '24bbcd5026cd8de5a77cd09ec8754753fff2280b':
  DO NOT MERGE cherrypick from jb-devChange-Id: I6eb11d3629dd13d2c7ac297cc9fa3828ed59f170 add style for code captions; ignore sidenav headers for HRs