Instead you could vary it by using i.e. "PEM KEY GOES HERE". Tho I must admit there is no real harm in producing a new private key that is not used - at least not directly; it might lead to copy/paste usage, which is obvious user error, but depends on the audience.
IMO, if you're writing documentation, you should be aware that any sample text or code will be copy/pasted by someone and will end up in production there.
Comments
Instead you could vary it by using i.e. "PEM KEY GOES HERE". Tho I must admit there is no real harm in producing a new private key that is not used - at least not directly; it might lead to copy/paste usage, which is obvious user error, but depends on the audience.
IMO, if you're writing documentation, you should be aware that any sample text or code will be copy/pasted by someone and will end up in production there.