Minor metadata correction to core.radar.get_elevation (#1489)

* FIX: change deprecated np.str in arm_vpt to str

* Update default wind_size in calculate_velocity_texture from 4 to 3
Using an odd number prevents single index offsets in placement in
case of an even size

* ADD: optional rectangular window dims for velocity texture analysis.
Also, modify the default window size to 3 instead of the previous
value of 4 (even number resulting in a potential offset).

* FIX: nyquist velocity dtype in radar obj loaded with read_kazr

* pep8

* line reformatting per black

* TST: unit tests for rectangular texture window

* STY: linting (black)

* FIX: Add in linting fixes

* FIX: metadata in core.radar.get_elevation

---------

Co-authored-by: mgrover1 <[email protected]>

pyart/core/radar.py

@@ -449,7 +449,7 @@ def get_elevation(self, sweep, copy=False):
 
         Returns
         -------
-        azimuths : array
+        elevation : array
             Array containing the elevation angles for a given sweep.
 
         """