make test requires manual steps

[tony-travis]

Hi,

Thanks for making your excellent tutorial available!

I had problems running "make test" until I realised that several manual steps detailed in "slides.pdf" need to be run before running "make test". I've modified "Makefile" Makefile.patch.gz to do these steps automatically, but "make test" produced some errors under Ubuntu-MATE 22.04.3:

make test
[...]
output file: slides.knit.md

/usr/bin/pandoc +RTS -K512m -RTS slides.utf8.md --to beamer --from markdown+autolink_bare_uris+tex_math_single_backslash-implicit_figures --output slides_test.tex --lua-filter /usr/lib/R/site-library/rmarkdown/rmarkdown/lua/pagebreak.lua --lua-filter /usr/lib/R/site-library/rmarkdown/rmarkdown/lua/latex-div.lua --template docs/beamer.tex --highlight-style tango --pdf-engine pdflatex --self-contained --highlight-style=pygments 
Warning: Package microtype Warning: Unable to apply patch `footnote' on input line 201.

Output created: slides_test.pdf
Warning messages:
1: In eval(expr, envir, enclos) : NAs introduced by coercion
2: In eval(expr, envir, enclos) : NAs introduced by coercion
3: In eval(expr, envir, enclos) : NAs introduced by coercion