Serialized block comments are not correctly indented right after a block starts

[krisrok]

Describe the bug
Here's what's expected:

Person:
  # The person's name
  Name: Paul
  # The person's age
  Age: 50

The current implementation yields:

Person:
# The person's name
  Name: Paul
  # The person's age
  Age: 50

To Reproduce
Serialize any class with a reference type having a comment (using YamlMemberAttribute) on its first property.

[EdwardCooke]

The PR fixing this was merged. Closing this.