
The `homebrew.pth` should be a file with a single line in it. Also (at least on zsh) if the file does not exist, `>>` will result in an error. The `>` works in both, bash and zsh and creates the file with the `echo`ed contet. Closes Homebrew/homebrew#28201. Signed-off-by: Jack Nagel <jacknagel@gmail.com>