In line 113 of the zshrc, we see a `case` statement that uses `` for inline command evaluation rather than `$()`. According to [this](https://unix.stackexchange.com/questions/126927/have-backticks-i-e-cmd-in-sh-shells-been-deprecated), this syntax is deprecated and is legacy and $() is the new `` but with things like better nesting and quoting.