A confidence interval (a vector of 2 elements; longer vectors work, but I guess that wouldn't make sense).
sep
The separator of the values, usually "; " or ", ".
prefix
The prefix, usually a type of opening parenthesis/bracket.
suffix
The suffix, usually a type of closing parenthesis/bracket.
digits
The number of digits to which to round the values.
noZero
Whether to strip the leading zero (before the decimal point), as is typically done when following APA style and displaying correlations, p values, and other numbers that cannot reach 1 or more.