BUG: Series with Categorical and dtype

[chris-b1]

xref #12573 (comment)

In [37]: pd.Series(pd.Categorical([1,2,3]), dtype='category')
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-37-87a1a3228158> in <module>()
----> 1 pd.Series(pd.Categorical([1,2,3]), dtype='category')

ValueError: cannot specify a dtype with a Categorical

[drewfustin]

@jreback I'm new to contributing to OS, let alone pandas. I think this is the fix that you're referencing. Let me know if not and I'll fix.