[docs] [issue14097] Improve the "introduction" page of the tutorial

Roundup Robot added the comment: New changeset 438da6ae38fa by Zachary Ware in branch '2.7': Issue #14097: Backport 796d1371605d and subsequent changes. http://hg.python.org/cpython/rev/438da6ae38fa ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue14097> _______________________________________