BUG: 27453 right merge order
Resurrection of #27762

I fixed the NameError in the test, and also changed the example given in the whatsnew entry (I couldn't see a difference between the outputs of 0.25.x and 1.0.0 in the original)

- [x] closes #27453
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

lgtm. not sure of the 1.0 milestone at this point but let's see what @TomAugspurger and @jreback think Is this fixing a regression in 0.25? Otherwise would prefer to keep it for 1.0.1

> On Jan 24, 2020, at 10:51, William Ayd <notifications@github.com> wrote:
> 
> ﻿
> lgtm. not sure of the 1.0 milestone at this point but let's see what @TomAugspurger and @jreback think
> 
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 @TomAugspurger as in, is it something that was working in 0.25 but isn't working on master? If so, then no, it's not a regression in 0.25.

Should I make a v1.0.1.rst whatsnew file then? > @TomAugspurger as in, is it something that was working in 0.25 but isn't working on master? If so, then no, it's not a regression in 0.25.
> 
> Should I make a v1.0.1.rst whatsnew file then?

no there is already a PR for that > Otherwise would prefer to keep it for 1.0.1

@TomAugspurger sure, whatsnew entry added in v1.0.1 I think this should be 1.1 at this point? AFAIK not a regression > I think this should be 1.1 at this point? AFAIK not a regression

@WillAyd Sure, have moved the whatsnew entry to v1.1.0 ping :) @jreback thanks - done thanks @MarcoGorelli for taking this over the line!