MNT: switch from ~ to not

Co-authored-by: Tim Hoffmann <[email protected]>

Author: tacaswell

lib/matplotlib/axes/_base.py

@@ -1680,7 +1680,7 @@ def set_aspect(self, aspect, adjustable=None, anchor=None, share=False):
             aspect = 1
         if not cbook._str_equal(aspect, 'auto'):
             aspect = float(aspect)  # raise ValueError if necessary
-            if aspect <= 0 or ~np.isfinite(aspect):
+            if aspect <= 0 or not np.isfinite(aspect):
                 raise ValueError("aspect must be finite and positive ")
 
         if share: