Insert the separator ("<|>") to later facilitate the reverse operation.
See also
Other support functions:
create_exercise_csv()
,
create_exercise_data_frame()
,
create_exercise_excel()
,
read_exercise_csv()
,
read_exercise_excel()
,
set_pending_answers()
,
write_exercise_csv()
Examples
s <- vector_to_string(c('Addition', '+'))