The HTML title of the Appendices documents are displayed as "untitled."

[dev-jonghoonpark]

The HTML title of the Appendices documents are displayed as "untitled."

This seems to occur because there is no level 0 header.

To resolve this, How about lowering the current header levels by one?
For example, changing == Which operator do I need? to = Which operator do I need? should resolve the issue. (Also, lower the level of the sub-items by one.)

[chemicL]

Hey, thanks! Would you be interested in opening a PR to address this?

[dev-jonghoonpark]

@chemicL
Yes, I'm interested. Thank you.
I'll try to submit a PR with the modifications I suggested above.