[ENH] add function to return contrast filename for a certain contrast name

[Remi-Gau]

No description provided.

[codecov]

Codecov Report

Merging #866 (6d73900) into main (08b34f6) will increase coverage by 0.06%.
The diff coverage is 96.55%.

@@            Coverage Diff             @@
##             main     #866      +/-   ##
==========================================
+ Coverage   78.80%   78.87%   +0.06%     
==========================================
  Files         235      236       +1     
  Lines        6180     6205      +25     
  Branches       37       37              
==========================================
+ Hits         4870     4894      +24     
- Misses       1295     1296       +1     
  Partials       15       15              

Flag	Coverage Δ
cli	40.16% <ø> (ø)
matlab	80.27% <96.55%> (+0.06%)	⬆️
octave	78.39% <96.55%> (+0.12%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/stats/utils/getContrastNb.m	85.71% <ø> (ø)
src/stats/utils/returnContrastImageFile.m	93.33% <93.33%> (ø)
src/messages/printAvailableContrasts.m	100.00% <100.00%> (ø)
src/messages/printToScreen.m	89.47% <100.00%> (ø)

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