remove text and leave code, especially useful when debugging.
ex.
$ erubis -s -E NoText file.eruby | more
this is language independent.
# File lib/erubis/enhancer.rb, line 282 def add_text(src, text) src << ("\n" * text.count("\n")) if text[-1] != \n\ text =~ %r^(.*?)\z/ src << (' ' * $1.length) end end