Fix fail msg so that placeholders are properly replaced
Fix fail msg so that placeholders are properly replaced

Output Before Fix:

[✖] Unsupported version, intended only for Ubuntu %s 14.04

Output After Fix:

[✖] Unsupported version, intended only for Ubuntu 14.04+

petemcw/dotfiles,petemcw/dotfiles,petemcw/dotfiles,petemcw/dotfiles