undent is undefined in Homebrew

[arlyon]

homebrew-formulae/Formula/yarp.rb

Lines 71 to 80 in 29c7335

	def caveats
	s = <<-EOS.undent
	You need to add in your ~/.bash_profile or similar:
	export YARP_DATA_DIRS=#{HOMEBREW_PREFIX}/share/yarp
	EOS
	s += " export LUA_CPATH=\";;;#{lib}/lua/?.so\"" if build.with? "bindings"
	s
	end

Installing this formula with homebrew crashes during the "caveats" stage, when printing the caveats. Note that the cask still installs correctly, just doesn't exit cleanly. This function was deprecated and then removed entirely. Some solutions are discussed here: Homebrew/homebrew-cask#49716 (comment)