Allow dicts in overwrite args of fetched artifact

[dafnapension]

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[codecov]

Codecov Report

Attention: Patch coverage is 95.86207% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 88.55%. Comparing base (4802d98) to head (dbb4467).

Files	Patch %	Lines
src/unitxt/parsing_utils.py	94.39%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #598      +/-   ##
==========================================
+ Coverage   88.46%   88.55%   +0.09%     
==========================================
  Files          87       87              
  Lines        7779     7858      +79     
==========================================
+ Hits         6882     6959      +77     
- Misses        897      899       +2     

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[elronbandel]

Keep in mind hugginface forbid the use of this character in datasets query strings:
<>:/\|?*
Meaning you can not use the new syntax with : so if you can come up with syntax that can leave under this restriction it will be good. Also maybe we should add internally an assertion that forbid this characters in names and strings with a proper message that huggingface wont support it.

This is the hugginface error for reference:

datasets.builder.InvalidConfigName: Bad characters from black list '<>:/\|?*' found in 'card=cards.stsb[metrics:[metrics.accuracy]]'. They could create issues when creating a directory for this config on Windows filesystem.

[dafnapension]

Thanks, @elronbandel , you mean the ":" is forbidden even it does not go to inside any name, only between names?
I will change to =
more intuitive in this jargon