Thank you for your feedback!

>> +(defcustom tab-line-switch-cycling nil
>> +  "Enable `tab-line-switch-to-next-tab',
>> +  `tab-line-switch-to-prev-tab' cycling switch. If the value is t,
>> +  the cycling switch is enabled. If the value is nil, it is disabled."
>
>The first line of the docstring should be a complete sentence
>as described in (info "(elisp) Documentation")

I changed the docstring to meet this rule. I also changed defcustom
keyword values for this variable.


I changed the Suppress... patch's commit comment so that the error
case becomes clearer.

Modified patches are attached.

Best regards,
Katsuyuki