Fail to extract Title in common cases in both pylatexenc V2 and V3

[MrForExample]

For example, when title in .tex file have following format:

• \title{FlexiTex: Enhancing Texture Generation with Visual Guidance}
• \title[DeepMimic: Example-Guided Deep Reinforcement Learning of Physics-Based Character Skills]{DeepMimic: Example-Guided Deep Reinforcement Learning\\ of Physics-Based Character Skills}

latex_to_text -> nodelist_to_text -> macro_node_to_text would fail to extract the text completely and return the empty string

[MrForExample]

Update:

I dig into the https://github.com/phfaist/pylatexenc/blob/main/pylatexenc/latex2text/_defaultspecs.py#L175

Turns out value is stored in LatexNodes2Text._doc_title variable

Right now, it can work for \title{FlexiTex: Enhancing Texture Generation with Visual Guidance}
But still fail on \title[DeepMimic: Example-Guided Deep Reinforcement Learning of Physics-Based Character Skills]{DeepMimic: Example-Guided Deep Reinforcement Learning\\ of Physics-Based Character Skills}, which will return '['