Modernize code to Python 3.6+ and some cleanup

05-record-like/typing_namedtuple/coordinates.py

@@ -14,7 +14,7 @@ class Coordinate(NamedTuple):
 
     lat: float
     long: float
-        
+
     def __str__(self):
         ns = 'N' if self.lat >= 0 else 'S'
         we = 'E' if self.long >= 0 else 'W'

05-record-like/typing_namedtuple/nocheck_demo.py

@@ -6,4 +6,4 @@ class Coordinate(typing.NamedTuple):
     long: float
 
 trash = Coordinate('foo', None)  # <1>
-print(trash)                           
+print(trash)