zshrc: Set LESS
Fedora et al. do not set the `LESS` environment variable like Gentoo does. As a result, `less` does not interpret ANSI color codes by default, making the output from `gs`, etc. aliases unreadable.
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Fedora et al. do not set the `LESS` environment variable like Gentoo does. As a result, `less` does not interpret ANSI color codes by default, making the output from `gs`, etc. aliases unreadable.