[3.7] bpo-29673: fix gdb scripts pystack and pystackv (GH-6126) (GH-6399)

(cherry picked from commit 3a9ccee0e5dbf7d67f5ab79f6095755969db117c)

Co-authored-by: Marcel Plch <gmarcel.plch@gmail.com>
diff --git a/Python/ceval.c b/Python/ceval.c
index b37205e..df5c093 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -3650,7 +3650,7 @@
 }
 
 /* This is gonna seem *real weird*, but if you put some other code between
-   PyEval_EvalFrame() and PyEval_EvalCodeEx() you will need to adjust
+   PyEval_EvalFrame() and _PyEval_EvalFrameDefault() you will need to adjust
    the test in the if statements in Misc/gdbinit (pystack and pystackv). */
 
 PyObject *