Merge pull request #7705 from etgalloway/script-magic-powershell

Remove powershell from script magic defaults

IPython/core/magics/script.py

@@ -104,7 +104,6 class ScriptMagics(Magics):
         if os.name == 'nt':
             defaults.extend([
                 'cmd',
-                'powershell',
             ])
         
         return defaults