PEP 544: Add missing empty body to examples (#3783)

Author: 1chooo

peps/pep-0544.rst

@@ -401,6 +401,7 @@ subtyping -- the semantics of inheritance is not changed. Examples::
             ...
         def complex_method(self) -> int:
             # some complex code here
+            ...
 
     class NiceColor(PColor):
         def draw(self) -> str:
@@ -415,6 +416,7 @@ subtyping -- the semantics of inheritance is not changed. Examples::
             return "probably gray"
         def complex_method(self) -> int:
             # class needs to implement this
+            ...
 
     nice: NiceColor
     another: ImplicitColor