removed redundant line
test exposing problem in lqmn for 1<x<1.0001
analytical expression of Q_1^1 for |x|>1 corrected
Merge pull request #3897 from gertingold/lqmn_gt_1

BUG: special: associated Legendre function of second kind for 1<|x|<1.0001

The function LQMN evaluating the associated Legendre function of second kind
on the real axis, a bug exists for 1<|x|<1.0001. At |x|=1.0001, the algorithm changes
and above this value, everything appears to be fine. Below this value, the algorithm
used for |x|<1 is employed with the help of a sign stored in the variable LS. However,
the explicit expression for Q_1^1 is incorrect, lacking a factor of LS and leading to
a jump in the function at |x|=1.0001. The correct sign factor has been introduced
and a test exposing the problem has been added.