fix completion for sub-command names

[jkowalleck]

shell completion for subcommands with custom names is broken.
here is a test and a fix.

this same tests and fixes are available for the 7.x maintenance branch via #1598

[davidism]

closing in favor of #1598, that will get merged forward

[davidism]

Decided I'll just be releasing 8.0 rather than another 7.x bugfix just for this, so I'll reopen this one. That said, this will be incompatible with #1622, which rewrites the entire completion system. Would you check that this is still an issue on that branch and leave a comment if so?

[jkowalleck]

Hello @davidism

Decided I'll just be releasing 8.0 rather than another 7.x bugfix just for this, so I'll reopen this one. That said, this will be incompatible with #1622, which rewrites the entire completion system.

i see.

Would you check that this is still an issue on that branch and leave a comment if so?

will write tests for MLH-Fellowship:1484-redesign-completion (#1622) and pullrequest fixes if needed.

[jkowalleck]

Hello @davidism

reviewed #1622 and found that it does not address the fixes from this very PR.
so i asked the authors of #1622 to have them included via MLH-Fellowship#28

[davidism]

Great, thanks for the help! I'll close this one again.