Small typo in Docs --> Quadrature

[ahenkes1]

There is a small typo in:

https://chaospy.readthedocs.io/en/master/user_guide/quadrature.html

To address this issue, the weight functions are incorporated into the weight terms by substituting W∗i\leftarraoWip(Xi), giving us:

should be \leftarrow

[jonathf]

Indeed. Thanks, I'll have it resolve with the next update.