How do i set up a key binding in fish, so that fish understands not to execute the bindingstring after appending it to commandline but just appending it as string to commandline.

I want to set up a binding that appends | less by pressing i.e. ALT + Y.

It seems that by default fish understands the command to automatically execute.

I.e. When i type ls on commandline and then would press ALT + Y it only should complete the command to look like this ls | less but still not executing it.

i'm trying something like this

bind \ey " \| less"

But fish doesn't accept my syntax