`nvm alias default --lts node` writes `--lts node` to the alias file,
so it resolves to the latest installed LTS version, using each version's recorded LTS status;
`--lts=<name>` limits it to one LTS line.
The flags of the outermost alias apply when one alias points at another,
an alias with a flag this version of nvm doesn't recognize resolves to nothing, rather than ignoring the flag,
and `nvm uninstall` also removes aliases with flags that point at the uninstalled version.
A new shell never downloads index.tab, so it explains a default alias that needs LTS status that isn't recorded yet.
Jordan Harband
fe2900d176