message: [lldb] UNXFAIL part of TestExprCompletion on swift-lldb.
  <rdar://problem/47370292>
diff: @@ -195,7 +195,6 @@ class CommandLineExprCompletionTestCase(TestBase):
  self.complete_exactly('expr some_expr.Self(). FooNoArgs',
  'expr some_expr.Self(). FooNoArgsBar()')
  - @expectedFailureAll(bugnumber="rdar://47370292")
  def test_expr_completion_with_descriptions(self):
  self.build()
  self.main_source = "main.cpp"
  