Merge pull request #2459 from ethereum/pyspec-build-var-fix

Pyspec builder internal config formatting fix

setup.py

@@ -596,7 +596,7 @@ def objects_to_spec(preset_name: str,
 
     def format_config_var(name: str, vardef: VariableDefinition) -> str:
         if vardef.type_name is None:
-            out = f'{name}={vardef.value}'
+            out = f'{name}={vardef.value},'
         else:
             out = f'{name}={vardef.type_name}({vardef.value}),'
         if vardef.comment is not None: