Remove trailing spaces in README example code

Author: johnthagen

openapi_python_client/templates/README.md.jinja

@@ -47,7 +47,7 @@ By default, when you're calling an HTTPS API it will attempt to verify that SSL
 
 ```python
 client = AuthenticatedClient(
-    base_url="https://internal_api.example.com", 
+    base_url="https://internal_api.example.com",
     token="SuperSecretToken",
     verify_ssl="/path/to/certificate_bundle.pem",
 )
@@ -57,7 +57,7 @@ You can also disable certificate validation altogether, but beware that **this i
 
 ```python
 client = AuthenticatedClient(
-    base_url="https://internal_api.example.com", 
+    base_url="https://internal_api.example.com",
     token="SuperSecretToken", 
     verify_ssl=False
 )