=str typos in returned types in javadsl
sadly a reflection based spec cannot easily test this
add Future case to javadsl.SinkTest
Merge branch 'fix-type-typos-javadsl-ktoso' into release-2.3-dev
!str #16188 Remove value equality of iterable flow
=pro a bold brute-force attempt at shortening PR validation times in the release-2.3-dev branch
!pro don't run extra-build-steps in release-2.3-dev
=str define number of tests to run for randomized tests globally