Rename Block to RubyBlock at Ruby level

The parser presents the whole call that defines the block as a block. And so does the Ruby layer, as we don't want to do processing in ast.
Just making it clearer, also Vool:: block will have to be renamed

test/ruby/test_ruby_block_statement.rb

@@ -9,7 +9,7 @@ module Ruby
       @lst = compile( input )
     end
     def test_block
-      assert_equal BlockStatement , @lst.class
+      assert_equal RubyBlockStatement , @lst.class
     end
     def test_send
       assert_equal SendStatement , @lst.send.class

test/ruby/test_ruby_block_statement1.rb

@@ -15,7 +15,7 @@ module Ruby
       assert_equal LocalAssignment , @lst.first.class
     end
     def test_assign_right
-      assert_equal BlockStatement , @lst.first.value.class
+      assert_equal RubyBlockStatement , @lst.first.value.class
     end
     def test_method_name
       assert_equal :plus_one , @lst.first.value.send.name

test/rubyx/parfait/test_object.rb

@@ -2,7 +2,7 @@ require_relative "helper"
 
 module RubyX
 
-  class TestObjecCompile < MiniTest::Test
+  class TestObjectCompile < MiniTest::Test
     include ParfaitHelper
     def source
       load_parfait(:object)