[3.7] bpo-34682: Wording and grammatical changes to the doc(https://docs.python.org/3) (GH-13120) (GH-13281)

https://bugs.python.org/issue34682
(cherry picked from commit 778a9107586e29421af3a08209cf0b557c1fe5bc)

Co-authored-by: divyag9 <divyam9@gmail.com>
diff --git a/Doc/reference/executionmodel.rst b/Doc/reference/executionmodel.rst
index ba7130d..49cb86b 100644
--- a/Doc/reference/executionmodel.rst
+++ b/Doc/reference/executionmodel.rst
@@ -243,7 +243,7 @@
 
 When an exception is not handled at all, the interpreter terminates execution of
 the program, or returns to its interactive main loop.  In either case, it prints
-a stack backtrace, except when the exception is :exc:`SystemExit`.
+a stack traceback, except when the exception is :exc:`SystemExit`.
 
 Exceptions are identified by class instances.  The :keyword:`except` clause is
 selected depending on the class of the instance: it must reference the class of