Fix whitespace

Author: stevegeek

lib/phlex/sgml.rb

@@ -508,7 +508,7 @@ def json_escape(string)
 				end
 			when Phlex::SGML::SafeObject
 				v.to_s.gsub('"', """)
-			when  -> (v) { v.respond_to?(:to_h) }
+			when -> (v) { v.respond_to?(:to_h) }
 				__nested_attributes__(v.to_h, "#{name}-", buffer)
 			else
 				raise Phlex::ArgumentError.new("Invalid attribute value for #{k}: #{v.inspect}.")