getLengthSquared() method in AbstractVector

[Pallavi Palleti]

Hi,

I found getLengthSqured() method name in AbstractVector slightly 
misguiding. As, it is not only getting the lengthSquared value but also 
setting it if it is not set previously. Actually, I found this issue 
when I am comparing two vectors, though both of them are same, in one 
place the lengthSquared value wasn't set (so, by default it has -1) and 
for other vector, it is set because the distance(double lengthSquared, 
Vector, Vector) method was called. So, when I am comparing the string 
format of both of them( as well vectors), they failed though they are 
same vectors but the lengthSquared value was different. I am not sure 
whether we can ignore this value while outputting in asFormatString(). 
Just wanted to bring to the notice so that it will be useful to others 
while experimenting (especially, in unit tests).

Thanks
Pallavi