math.functions-docs: fix wording for abs and absq
math.functions-docs: fix wording for abs and absq

Those functions are not specific to complex numbers.

factor/factor,bjourne/factor,AlexIljin/factor,tgunr/factor,mrjbq7/factor,bjourne/factor,bpollack/factor,tgunr/factor,AlexIljin/factor,factor/factor,mrjbq7/factor,factor/factor,AlexIljin/factor,factor/factor,tgunr/factor,factor/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,AlexIljin/factor,bjourne/factor,tgunr/factor,bjourne/factor,bjourne/factor,bjourne/factor,tgunr/factor,bjourne/factor,bpollack/factor,bpollack/factor,bpollack/factor,factor/factor,AlexIljin/factor,AlexIljin/factor,bpollack/factor,mrjbq7/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,AlexIljin/factor