[R] How to remove the second line generated by addHeader function in the rtf package

[Zhiqiu Hu]

Dear friends,

The addHeader function in the rtf package always generates two rows of texts
even if a subtitle was not specified. Is there any way to stop the function
from generating the second blank line?

FYI, I cannot use the other functions, such as the addParagram and the
addText, because the addHeader function is the only one allowing to set up
TOC levels for contents.

I appreciate your kind help with the matters.

Sincerely,

Zhiqiu

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