`unknown condition: -ne` when executing `nvm install --lts` while latest LTS version of Node.js is already installed

[ksze]

Steps to reproduce:

1. run nvm install --lts to install the latest LTS version (v18.12.0 as of this writing) of Node.js
2. run nvm install --lts again.

Output:

Installing latest LTS version.
v18.12.0 is already installed.
Now using node v18.12.0 (npm v8.19.2)
_zsh_nvm_nvm:[:523: unknown condition: -ne
_zsh_nvm_nvm:[:528: unknown condition: -ne
_zsh_nvm_nvm:[:541: unknown condition: -ne

[fearnliu]

Hello, @ksze please see here: nvm-sh/nvm#2914.