ERB
Bundler::Thor::Actions#capture depends on what kind of buffer is used in ERB. Thus CapturableERB fixes ERB to use String buffer.
# File bundler/vendor/thor/lib/thor/actions/file_manipulation.rb, line 365
def set_eoutvar(compiler, eoutvar = "_erbout")
compiler.put_cmd = "#{eoutvar}.concat"
compiler.insert_cmd = "#{eoutvar}.concat"
compiler.pre_cmd = ["#{eoutvar} = ''.dup"]
compiler.post_cmd = [eoutvar]
end