Use FuncFormatter to convert ds2 to d-spacings

[rjgildea]

See also xia2/xia2#636

[benjaminhwilliams]

Just one suggestion, see inline comment below.

Also, I notice that fig and ax are defined early in dials.background but only used if params.output.plot is truthy. Should fig = ... and ax = ... be moved down to ~L117?
Please ignore, I wasn't reading it thoroughly enough.

[rjgildea]

Also, I notice that fig and ax are defined early in dials.background but only used if params.output.plot is truthy. Should fig = ... and ax = ... be moved down to ~L117?

I think this is because the plots are added to ax within a loop over imagesets - so if multiple imagesets are passed, then they all appear on the same plot.

[codecov]

Codecov Report

Merging #1953 (1b6443b) into main (1eef873) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

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##             main    #1953      +/-   ##
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- Coverage   67.15%   67.15%   -0.01%     
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  Files         620      621       +1     
  Lines       70129    70128       -1     
  Branches    10360    10357       -3     
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- Hits        47095    47094       -1     
  Misses      21063    21063              
  Partials     1971     1971