mobility: (fixes #955) use allowed symbols in test name
Now the test name is:
Rectangle closest border test : checking (x,y) = (2,5) closest border to the rectangle [(0, 0), (10, 10)]. ...
Now the test name is:
Rectangle closest border test : checking (x,y) = (2,5) closest border to the rectangle [(0, 0), (10, 10)]. ...