3.x: Update marbles for concatMap{Single|Maybe}[DelayError]

[akarnokd]

Resolves #7660

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.59%. Comparing base (9b55d01) to head (42de6af).
Report is 42 commits behind head on 3.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                3.x    #7698      +/-   ##
============================================
- Coverage     99.62%   99.59%   -0.03%     
+ Complexity     6801     6799       -2     
============================================
  Files           752      752              
  Lines         47707    47707              
  Branches       6401     6401              
============================================
- Hits          47527    47516      -11     
- Misses           84       87       +3     
- Partials         96      104       +8     

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