Resolving VSP Export Issues

[Rohan Selvan]

Hello! I am on the `develop` branch of SUAVE. I am following the 'basic eVTOL' video tutorial. When running the following code snippet,

`write(vehicle, 'vsp_file_name')`

I ran into a couple errors in the files `vsp_fuselage` and `vsp_propeller`. I have attached images of the code below (left) as well as my changes to prevent the code from erroring (right). I wanted to double check that these changes make sense with the developers and are not debilitating SUAVE in some way. Thank you for your time.

File: `vsp_propeller.py`, function: `make_airfoil_text`

file: 'vsp_fuselage.py', function: `write_vsp_fuselage`

Sincerely,

Rohan Selvan