I had forgotten that!  Thanks for reminding me.  I've always thought that's a very odd "feature" of ruby that's more likely to hide a problem (e.g. `["foo" "bar"]` -- you probably meant `["foo", "bar"]`) than to actually be useful.  I think I'd prefer to see `+` used rather than `\` since the goal is to concatenate these strings and `+` is more explicit.