Correct docs grouping for neg operator
Correct docs grouping for neg operator

umar456/arrayfire,arrayfire/arrayfire,umar456/arrayfire,9prady9/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,umar456/arrayfire,9prady9/arrayfire,9prady9/arrayfire,arrayfire/arrayfire,arrayfire/arrayfire,umar456/arrayfire