±
{± | plusValue | minusValue}
The template can be written "+-" for ease of typing, e.g. 70.5{+-|2.0|1.8}.
70.5{+-|2.0|1.8}
{±|2} returns ±2
{±|2}
{±|2.0|1.8} returns +2.0−1.8
{±|2.0|1.8}