Make a page for the reading assignment for one class, from the semester database.
make_reading_page(cal_id, semester, use_pdfs = TRUE)
The calendar ID for this assignment.
A semester object (a list returned by
\link{load_semester_db}
).
Add a pdf_url
field to the YAML header so a PDF file will
be generated for the reading assignment.
A character string with the Markdown content for the reading assignment page.