replace string var by const

[dsy3502]

replace string var by const

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4147dd6) 52.19% compared to head (251506e) 52.20%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1839   +/-   ##
=======================================
  Coverage   52.19%   52.20%           
=======================================
  Files         172      172           
  Lines       20825    20825           
=======================================
+ Hits        10869    10871    +2     
+ Misses       8994     8993    -1     
+ Partials      962      961    -1     

Flag	Coverage Δ
unittests	52.20% <100.00%> (+<0.01%)	⬆️

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[rambohe-ch]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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