Minor bug fix with f-strings

numpy/distutils/system_info.py

@@ -819,7 +819,7 @@ def get_option_single(self, *options):
         if AliasedOptionError.__doc__ is None:
             raise AliasedOptionError()
         raise AliasedOptionError(AliasedOptionError.__doc__.format(
-            section=self.section, options=f'[{', '.join(options)}]'))
+            section=self.section, options=f'[{", ".join(options)}]'))
 
 
     def has_info(self):