Outdated Documentation for Map.Grow

[StandoffVenus]

The map.Grow method's comment states:

Grow resizes the hashmap to a new size, gets rounded up to next power of 2
To double the size of the hashmap use newSize 0
This function returns immediately, the resize operation is done in a goroutine
No resizing is done in case of another resize operation already being in progress
Growth and map bucket policy is inspired from https://github.com/cornelk/hashmap

But commit d071dd5f749f86017a32bc126ea40eaade5f3dfc changed map.Grow to be sync, making this part of the comment inaccurate:

This function returns immediately, the resize operation is done in a goroutine

[alphadose]

@StandoffVenus fixed with 9338469