[FIX] returnRootDir did not return the root dir

[Remi-Gau]

No description provided.

[codecov]

Codecov Report

Merging #498 (032895d) into dev (3bd7755) will decrease coverage by 0.12%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev     #498      +/-   ##
==========================================
- Coverage   72.87%   72.74%   -0.13%     
==========================================
  Files         193      193              
  Lines        4040     4047       +7     
==========================================
  Hits         2944     2944              
- Misses       1096     1103       +7     

Flag	Coverage Δ
unittests	72.74% <0.00%> (-0.13%)	⬇️

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Impacted Files	Coverage Δ
src/defaults/overRideWithBidsModelContent.m	80.95% <ø> (ø)
src/infra/getEnvInfo.m	77.27% <ø> (ø)
src/infra/returnRootDir.m	0.00% <0.00%> (ø)

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