Peak does not return next event

[BernieWhite]

Peak<T> nomenclature and comment indicates that it should return the next event without consuming it.

Actual behaviour is to return the current event without consuming it.

https://github.com/aaubry/YamlDotNet/blob/2c6d52253cdd8d67256bbac6b26322ffcdeb49f0/YamlDotNet/Core/ParserExtensions.cs#L87-L99

Accept indicates it checks the current event.

https://github.com/aaubry/YamlDotNet/blob/2c6d52253cdd8d67256bbac6b26322ffcdeb49f0/YamlDotNet/Core/ParserExtensions.cs#L52-L67

This is from master currently.

Really what I want to achieve is to check the next event so that I can determine a sequence, so that I can avoid consuming DocumentEnd unless it is followed by a DocumentStart event.

if (reader.Accept<DocumentEnd>())
{
    if (reader.Peek<DocumentStart>() != null)
    {
        reader.Allow<DocumentEnd>();
        reader.Allow<DocumentStart>();
    }
}