contrib: correct parameter name

[An-DJ]

Relevant Issue (if applicable)

If there are Issues related to this PullRequest, please list it.

Details

suffix -> prefix

Types of changes

What types of changes does your PullRequest introduce? Put an x in all the boxes that apply:

• 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 change)
• Documentation Update (if none of the other choices apply)

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #1470 (8f11688) into master (240af3e) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1470      +/-   ##
==========================================
- Coverage   53.79%   53.75%   -0.05%     
==========================================
  Files         123      123              
  Lines       40172    40172              
  Branches    40172    40172              
==========================================
- Hits        21612    21595      -17     
- Misses      17334    17350      +16     
- Partials     1226     1227       +1     

see 5 files with indirect coverage changes

[Desiki-high]

LGTM

[imeoer]

Thanks!