I've installed the bundle, but when I'm trying to use option-shift-m (jump to method), I'm getting a weird error message:
/tmp/ruby-amp-978.rb:18: invalid multibyte char (US-ASCII)
/tmp/ruby-amp-978.rb:18: invalid multibyte char (US-ASCII)
/tmp/ruby-amp-978.rb:18: syntax error, unexpected $end, expecting '}'
grepper.title = "Searching for method “#{ m }”"
^
Google led me to this, which unfortunately didn't work out for me.