Add space after docstring

Author: davepeck

peps/pep-0750.rst

@@ -140,6 +140,7 @@ Template strings evaluate to an instance of a new type, ``<<TBD>>.Template``:
 
     class Template:
         """Simulated implementation of the PEP750 Template type."""
+        
         strings: tuple[str, ...]
         """
         A tuple of the N+1 string parts of the template, where N is