Release bookdown 0.16 · rstudio/bookdown

NEW FEATURES

You can also add a "view" button on the GitBook toolbar, similar to the "edit" and "history" buttons, which shows the page's .Rmd source file on GitHub. Unlike "edit", "view" does not require the reader to login to GitHub and fork the repo (thanks, @jtr13, #806).
For gitbook output, the font setting button can be removed via fontsettings: false in the config option. Similarly, the info button can be removed by info: false in config (thanks, @mnazarov, #788).
It is possible to customize the prefixes of appendix titles in gitbook output now (the default is still A, B, C, ..., and now you can change them to something like Appendix A, Appendix B, ...); see the documentation at https://bookdown.org/yihui/bookdown/internationalization.html (thanks, @WerthPADOH, #783).
Added html_fragment2, html_notebook2, html_vignette2, ioslides_presentation2, slidy_presentation2, and beamer_presentation2 for cross-referencing capabilities on top of rmarkdown output formats (thanks, @jooyoungseo, #789 #823).

For the gitbook output format, disabling the sharing menu or buttons works again (thanks, @lwjohnst86, #812).
For the gitbook output format, toc collapsed by section now works with accents in chapter titles (thanks, @glimmerphoenix, @cderv, #819)
For output formats word_document2, powerpoint_presentation2, and odt_document2, $$ is no longer added to equation environments when they are inside fenced code blocks (thanks, @N0rbert, #814).