Used format strings throughout TARDIS

[WinstonPais]

Description

Motivation and Context

#1205

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have assigned/requested two reviewers for this pull request.

[codecov]

Codecov Report

Merging #1315 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1315      +/-   ##
==========================================
- Coverage   81.57%   81.53%   -0.05%     
==========================================
  Files          46       46              
  Lines        3799     3801       +2     
==========================================
  Hits         3099     3099              
- Misses        700      702       +2     

Impacted Files	Coverage Δ
tardis/tardis/io/atom_data/base.py	90.11% <0.00%> (-1.07%)	⬇️
tardis/tardis/io/decay.py	89.65% <0.00%> (ø)
tardis/tardis/util/base.py	77.77% <0.00%> (ø)
tardis/tardis/plasma/base.py	58.27% <0.00%> (ø)
tardis/tardis/io/model_reader.py	97.70% <0.00%> (ø)
tardis/tardis/simulation/base.py	85.54% <0.00%> (ø)
tardis/tardis/io/atom_data/util.py	47.05% <0.00%> (ø)
tardis/tardis/plasma/exceptions.py	87.50% <0.00%> (ø)
tardis/tardis/io/config_internal.py	34.48% <0.00%> (ø)
tardis/tardis/widgets/shell_info.py	96.00% <0.00%> (ø)
... and 5 more

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[wkerzendorf]

looks - good at christian + Andreas into Co-authored