[issue14112] tutorial intro talks of "shallow copy" concept without explanation

[Raymond Hettinger]

Change by Raymond Hettinger <raymond.hettinger at gmail.com>:


----------
pull_requests: +15113
pull_request: https://github.com/python/cpython/pull/15408

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue14112>
_______________________________________