fix(python): Replace spaces with   to support showing multiple spaces in HTML repr

[TNieuwdorp]

Fixes #19665

Before:

After:

I've added a small unit test that checks for a right output for the repr in test_repr_html.py, not sure if it's the correct location. Please let me know.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.56%. Comparing base (420c0d9) to head (d0e270b).
Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main   #19783    +/-   ##
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  Coverage   79.55%   79.56%            
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  Files        1544     1545     +1     
  Lines      213240   213442   +202     
  Branches     2441     2444     +3     
========================================
+ Hits       169645   169815   +170     
- Misses      43046    43077    +31     
- Partials      549      550     +1     

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[alexander-beedie]

For the test I wouldn't assert quite so much detail, in case other (unrelated) formatting/elements change in the future - just assert that the strings which should now contain   are all present in the html_repr output?
Aside from that minor nit, looks good to go 😎

[TNieuwdorp]

I'm using a regex for it, which I've elaborated with a comment above because regex is like arcane magic when you don't write it yourself

[alexander-beedie]

I'm using a regex for it, which I've elaborated with a comment above because regex is like arcane magic when you don't write it yourself

I speak fluent regex ✌️😎