Added significant digits formatter for rope values

[MgeeeeK]

Description

Added significant digits formatter for rope values. To fix #1561

Checklist

• Follows official PR format
• Code style correct (follows pylint and black guidelines)
• Changes are listed in changelog

[MgeeeeK]

Hi @OriolAbril can you take a look

[OriolAbril]

Looks great, thanks! You have to run black and add it to the changelog, then we can merge it.

[OriolAbril]

What version of black do you have? It should not be modifying any unmodified file 🤔

[MgeeeeK]

I was having same doubt looks like my package is outdated (its 19.3b0 installed using conda). Will update and push again.

[OriolAbril]

You may have to undo the latest commit for this to work. Have you ever done interactive rebase?

[codecov]

Codecov Report

Merging #1569 (861677a) into main (1a7f83f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1569   +/-   ##
=======================================
  Coverage   90.28%   90.28%           
=======================================
  Files         105      105           
  Lines       11403    11405    +2     
=======================================
+ Hits        10295    10297    +2     
  Misses       1108     1108           

Impacted Files	Coverage Δ
arviz/plots/backends/bokeh/posteriorplot.py	98.16% <100.00%> (+0.01%)	⬆️
arviz/plots/backends/matplotlib/posteriorplot.py	98.26% <100.00%> (+0.01%)	⬆️

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