At first there were 6 steps, but one was removed after that.

Doc/ref/ref7.tex

@@ -340,7 +340,7 @@ statement, the return value from \method{__enter__()} is assigned to it.
 \method{__enter__()} method returns without an error, then
 \method{__exit__()} will always be called. Thus, if an error occurs
 during the assignment to the target list, it will be treated the same as
-an error occurring within the suite would be. See step 6 below.}
+an error occurring within the suite would be. See step 5 below.}
 
 \item The suite is executed.