Trailing Edge Gap Test

[juddmehr]

I'm suspicious as the whether the trailing edge gap calculation is correct. Need to add a test for it.

[juddmehr]

There is definitely a bug here in the updated version. need to find the bug and add associated tests.

[justhawk98]

I ran the old and new versions of get_trailing_edge_info() on the same airfoil geometry and the results were identical. The bug isn't there.