Review of domain_to_idna()
Review of domain_to_idna()

This patch review the way we get the comment at the end of a line.
I also did an application of DRY (Do not Repeat Yourself)
and/or KISS (Keep It Simple, Stupid) by refactoring the 2 `else`
statements into one line.

gfyoung/hosts,StevenBlack/hosts,StevenBlack/hosts,gfyoung/hosts,borisschapira/hosts