first risc level block test working

assign was not executing yield
baecause it was just testing for send, instead of callable

lib/vool/assignment.rb

@@ -16,7 +16,7 @@ module Vool
     end
 
     def chain_assign(assign , compiler)
-      return assign unless @value.is_a?(SendStatement)
+      return assign unless @value.is_a?(CallStatement)
       @value.to_mom(compiler) << assign
     end
   end

lib/vool/yield_statement.rb

@@ -8,7 +8,7 @@ module Vool
   # On the way down to Mom, small differences become abvious, as the block that is
   # yielded to is an argument. Whereas in a send it is either statically known
   # or resolved and cached. Here it is dynamic, but sort of known dynamic.
-  # All we do before calling it is check that it is the right type. 
+  # All we do before calling it is check that it is the right type.
   class YieldStatement < CallStatement
 
     # A Yield breaks down to 2 steps: