capture_block.rb

def banner
  banner_text = "----------\n"
  banner_text << yield
  banner_text << "\n----------\n"
  banner_text
end

banner_text = banner do
  "foo"
  "bar"
end

puts banner_text

# Outputs:
# ----------
# bar
# ----------
#
# 
# How do I get it to output:
# ----------
# foo
# bar
# ----------