The tweakSignCopy description reads:

When enabled, placed signs will use the text from the previously placed sign.
Can be combined with tweakNoSignGui to quickly place copies of a sign, by enabling that tweak after making the first sign.

It seems that the ability to disable the sign GUI is now under "Yeets," and called disableSignGui. I would recommend updating this description to read:

When enabled, placed signs will use the text from the previously placed sign.
Can be combined with disableSignGui to quickly place copies of a sign, by enabling that yeet after making the first sign.