Submission Checklist

• Builds locally -- see below
• [x ] New functions marked with `r since("VERSION")`
• [x ] Declare copyright holder and open-source license: see below

Summary

Minor improvements and fixes to documentation.

Note I get tex build errors which seem unrelated to my changes

$ ./build.py 2 32
render functions-reference as pdf
output file: stan_docs/docs/2_32/functions-reference-2_32.pdf
render functions-reference as html
output dir: stan_docs/docs/2_32/functions-reference
render reference-manual as pdf
output file: stan_docs/docs/2_32/reference-manual-2_32.pdf
render reference-manual as html
output dir: stan_docs/docs/2_32/reference-manual
render stan-users-guide as pdf
Command Rscript -e "bookdown::render_book('index.Rmd', output_format='bookdown::pdf_book')" failed
processing file: _main.Rmd
output file: _main.knit.md
! TeX capacity exceeded, sorry [input stack size=10000]. \font@name -> \T1/bch/b/n/17.28
l.16293 ...org/wiki/Amdahl\textquotesingle{}s_law}
{Amdahl's
Error: LaTeX failed to compile _main.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See _main.log for more info.
Execution halted
Traceback (most recent call last):
File "stan_docs/./build.py", line 129, in
main()
File "stan_docs/./build.py", line 125, in main
make_docs(docspath, stan_version, doc, formats)
File "stan_docs/./build.py", line 56, in make_docs
shexec(command)
File "stan_docs/./build.py", line 36, in shexec
raise Exception(ret.returncode)
Exception: 1

Copyright and Licensing

Please list the copyright holder for the work you are submitting (this will be you or your assignee, such as a university or company): Michael Gilchrist

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the following licenses:

• Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
• Documentation: CC BY-ND 4.0 (https://creativecommons.org/licenses/by-nd/4.0/)