gh-106625 : Add missing code to tutorial 4.6 example (#106623)

* Added missing import statement.

* Update Doc/tutorial/controlflow.rst

* Update Doc/tutorial/controlflow.rst

* Update controlflow.rst

* Make point regular class with __init__.

---------

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

1 files changed, 3 insertions, 2 deletions

diff --git a/Doc/tutorial/controlflow.rst b/Doc/tutorial/controlflow.rst
index c9b3d98..4336bf5 100644
--- a/Doc/tutorial/controlflow.rst
+++ b/Doc/tutorial/controlflow.rst
@@ -307,8 +307,9 @@ you can use the class name followed by an argument list resembling a
 constructor, but with the ability to capture attributes into variables::
 
     class Point:
-        x: int
-        y: int
+        def __init__(self, x, y):
+            self.x = x
+            self.y = y
 
     def where_is(point):
         match point: