%r<this is a valid regexp>e.to_s
# That's right.

%r(this one is valid, but...()
it actually closes right here:)i.inspect
# Tricky.

%r[this is valid too]x.clone
# Correct.

%r.and this.i.source
# Uh-huh.

%r!and
            this, too\!!.!
# So it is.

%r|what about this?|n.kind_of?
# Yep.

%r,oh my %r{goodness}\, can this one possibly be valid?!@$\#%^|\/,xi.dup
# You betcha it can.

%r%ruby sure allow\%s a lot of peculiar regexps!%ou.options
# Indeed it does.

%r"it's enough to #{"drive"} a syntax
/highlighter/
insane!

"mixixixixi.pie
# I concur.