2.x: Add Maybe.hide() marble diagram

[akarnokd]

Add marble to Maybe.hide():

[codecov]

Codecov Report

Merging #6078 into 2.x will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #6078      +/-   ##
============================================
- Coverage     98.26%   98.25%   -0.01%     
+ Complexity     6192     6189       -3     
============================================
  Files           666      666              
  Lines         44806    44806              
  Branches       6206     6206              
============================================
- Hits          44028    44025       -3     
- Misses          236      238       +2     
- Partials        542      543       +1

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/io/reactivex/Maybe.java	100% <ø> (ø)	171 <0> (ø)	⬇️
...nternal/operators/parallel/ParallelReduceFull.java	91.08% <0%> (-3.97%)	2% <0%> (ø)
...ernal/operators/flowable/FlowableFlatMapMaybe.java	91.78% <0%> (-3.87%)	2% <0%> (ø)
...reactivex/internal/operators/single/SingleAmb.java	96.36% <0%> (-3.64%)	9% <0%> (-1%)
...ava/io/reactivex/processors/BehaviorProcessor.java	95.96% <0%> (-3.14%)	60% <0%> (ø)
...rnal/operators/observable/ObservableSwitchMap.java	93.61% <0%> (-2.66%)	3% <0%> (ø)
...a/io/reactivex/internal/util/QueueDrainHelper.java	98.61% <0%> (-1.39%)	57% <0%> (-1%)
...ternal/operators/completable/CompletableMerge.java	96.42% <0%> (-1.2%)	2% <0%> (ø)
...java/io/reactivex/processors/UnicastProcessor.java	98.8% <0%> (-1.2%)	67% <0%> (-1%)
...perators/mixed/ObservableSwitchMapCompletable.java	98.94% <0%> (-1.06%)	3% <0%> (ø)
... and 20 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c8a9852...3319192. Read the comment docs.