Address the deprecation of `clean_envir` in bookdown

jhudsl / ottrpal

Tools for converting OTTR courses into Leanpub or Coursera courses :otter:

https://jhudatascience.org/ottrpal/

GNU General Public License v3.0

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Address the deprecation of `clean_envir` in bookdown #71

Open cansavvy opened 3 years ago

cansavvy commented 3 years ago

Now that we've upgraded to bookdown 0.24 we get this warning message:

Warning message:
In bookdown::render_book(input = index_file, output_format = output_format,  :
  The argument 'clean_envir' has been deprecated and will be removed in future versions of bookdown.