Fix quote character typo in site documentation for templates
Removed github-pages warning about singular types now that gh-pages is running 2.3.0
Update latest_version.txt file on the site.
Merge pull request #2919 from bcomnes/singular-docs
Update history to reflect merge of #2919 [ci skip]
Merge pull request #2917 from nitoyon/fix-template-doc
Update history to reflect merge of #2917 [ci skip]