Sinatra::Capture is not compatible with Haml 6

[jkowens]

Haml::Buffer was removed.

See: haml/haml#1058, haml/haml#1057

Hi @k0kubun any suggestions on how to handle this code below?

sinatra/sinatra-contrib/lib/sinatra/capture.rb

Lines 90 to 92 in 8ae87a8

	if haml? && Tilt[:haml] == Tilt::HamlTemplate
	buffer = Haml::Buffer.new(nil, Haml::Options.new.for_buffer)
	with_haml_buffer(buffer) { capture_haml(*args, &block) }

[k0kubun]

As to capturing a block, when disable_capture is false (default except for Rails), you can capture a block content by just calling a block when the method is called from - script (not = script). You don't need to rely on Haml::Buffer for capturing purposes.