Aneta Siemiginowska

Regrid was not implemented for the templates for some reason. It should be considered.

@DougBurke I tried the code in this PR and it looks ok. Do you plan on including this in the current release?

@DougBurke I've been looking at the template code. Did you plan to include it in the release?

ok. I can check/review some remaining filtering/grouping PRs later today.

@DougBurke Thanks for the detailed description. It looks good. I included two comments in the doc places. There is a Warning in the XSPEC screen output above indicating that there...

Here is the comparison of the data plots in XSPEC and Sherpa. Sherpa shows the errors of 1 for the channels with 0 counts and XSPEC ignores the errors there....

Looking at the plots this morning I noticed that in the XSPEC plot you can identify the channels with negative values!

@DougBurke I approved this PR and I suggest to include in the release.

I just installed `pytest` and ran a few doc tests. This is good for catching the typos and errors in the docs and it would help to debug our docs...

I see some failures in the output of the examples where the expected outputs do not agree. I'm wondering if we have to fix examples by hand. ``` pytest --doctest-rst...