Reformat 'snek-builtin.py'

Black found a spurious semicolon.

Signed-off-by: Keith Packard <keithp@keithp.com>

snek-builtin.py

@@ -96,7 +96,7 @@ def func_name(self):
             if self.value[0].isdigit():
                 return "(snek_poly_t)(float)%s" % self.value
             return self.value
-        name = self.name;
+        name = self.name
         if self.init is not None:
             name = self.init
         return "snek_builtin_%s" % (name.replace(".", "_"))