Intent of usage.mjs|title=usage tests commands should list a module command only once|occurrence=1

All 1 exact test in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=yargs@4153e0f097aeaf43a71a2530db6dda51dff2c544:main|file=test/ 1 test
- mocha:v1|namespace=yargs@4153e0f097aeaf43a71a2530db6dda51dff2c544:main|file=test/usage.mjs|title=usage tests commands should list a module command only once|occurrence=1 Introduced here