Intent of usage.mjs|title=usage tests help option should use 2 dashes for multiple-digit alias usage|occurrence=1

All 2 exact tests in this concept. Every test is marked by where it enters the hierarchy.

mocha:v1|namespace=yargs@4153e0f097aeaf43a71a2530db6dda51dff2c544:main|file=test/ 2 tests
- mocha:v1|namespace=yargs@4153e0f097aeaf43a71a2530db6dda51dff2c544:main|file=test/usage.mjs|title=usage tests help option should use 2 dashes for multiple-digit alias usage|occurrence=1 Introduced here
- mocha:v1|namespace=yargs@4153e0f097aeaf43a71a2530db6dda51dff2c544:main|file=test/usage.mjs|title=usage tests help option should use single dashes for 1-digit boolean alias usage|occurrence=1 Inherited usage.mjs|title=usage tests help option should use single dashes for 1-digit boolean alias usage|occurrence=1