Mark RuboCop::AST::EnsureNode as being in a void context.

changelog/change_mark_ensure_as_void_context.md

@@ -0,0 +1 @@
+* [#309](https://github.com/rubocop/rubocop-ast/pull/309): Mark `RuboCop::AST::EnsureNode` as being in a void context. ([@earlopain][])

lib/rubocop/ast/node/ensure_node.rb

@@ -12,6 +12,14 @@ class EnsureNode < Node
  def body
  node_parts[1]
  end
+
+ # Checks whether this node body is a void context.
+ # Always `true` for `ensure`.
+ #
+ # @return [true] whether the `ensure` node body is a void context
+ def void_context?
+ true
+ end
  end
  end
 end

spec/rubocop/ast/ensure_node_spec.rb

@@ -14,4 +14,10 @@
 
  it { expect(ensure_node.body).to be_sym_type }
  end
+
+ describe '#void_context?' do
+ let(:source) { 'begin; beginbody; ensure; ensurebody; end' }
+
+ it { expect(ensure_node).to be_void_context }
+ end
 end