Release bookdown 0.18 · rstudio/bookdown

NEW FEATURES

Added an output format context_document2, based on the newly developed rmarkdown::context_document (see rstudio/rmarkdown#1713, rstudio/rmarkdown#1715, and rstudio/rmarkdown#1725; thanks @jooyoungseo, @atusy, and @RLesur).

render_book() works correctly with output_dir = "." now (thanks, @julianre, @cderv, #857).
Cross-referencing works correctly now with gitbook when using split_by: section or split_by: section+number (thanks, @ThierryO, @cderv, #787).
When using the Knit-and-Merge approach to compile a book (new_session: true in _bookdown.yml) and the fields before_chapter_script and/or after_chapter_script are configured in _bookdown.yml, the original Rmd files are no longer touched (thanks, @clauswilke #405 and @bob-carpenter https://stackoverflow.com/q/50554196/559676), and the scripts specified in before/after_chapter_script are no longer inserted into the Rmd files (they are read and evaluated separately), so the line numbers will be correct in case of knitr errors (thanks, @arencambre, #852).