Q: Using Elisp, how can I reset a variable to its default value without knowing what that value is?
I tried to figure out how to do this by bringing up the Customize interface for a variable I set to a non-default value in my init-file and pressing C-h k followed by a click on the "Revert..." button. That brought up the documentation for
widget-button-click, which obviously didn't help much. (Similarly, C-h k RET with point on the button shows help for
Custom-newline, which is also not what I am looking for.)