Fixed the broken --random flag

[lonnblad]

Solution for #316

[codecov]

Codecov Report

Merging #317 into master will increase coverage by 0.10%.
The diff coverage is 77.27%.

@@            Coverage Diff             @@
##           master     #317      +/-   ##
==========================================
+ Coverage   85.30%   85.40%   +0.10%     
==========================================
  Files          23       23              
  Lines        2667     2686      +19     
==========================================
+ Hits         2275     2294      +19     
- Misses        264      265       +1     
+ Partials      128      127       -1     

Impacted Files	Coverage Δ
suite.go	81.94% <44.44%> (-1.71%)	⬇️
run.go	73.13% <100.00%> (+2.60%)	⬆️
fmt_base.go	96.40% <0.00%> (+2.15%)	⬆️

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