format_authoryear_p: format the author and year parenthetically
Description
This formats a single entry, though adjusted by author.
This function is passed down to 'cite' by 'citep', wher
it creates the actuall formatting on the first use.
Usage
format_authoryear_p(entry, char = "")
Arguments
entry
a bibentry
char
a character to append to the citation (to disambiguate).
This is handled automatically by the cite function.