[docs] [issue37829] Documentation of stdlib: add example of mixed arguments to dict()

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan <tir.karthi at gmail.com>:


----------
nosy: +inada.naoki, rhettinger
versions:  -Python 3.5, Python 3.6

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37829>
_______________________________________