If I set my nbdime_config.json to:

{
  "Global": {
    "Ignore": {
      "/cells/*/execution_count": false
    },
    "details": false
  }
}

I expect the details and Ignore to be applied to every nbdime tool, given that

Global Options to apply to all commands.
[sections](https://github.com/jupyter/nbdime/blob/d44e3b5d09ba16163d71ef38e98f288c0a88b391/docs/

It would be nice to have all user variables in just one file and then everything would get that from that file. Something like .user.

The 'Recovering old versions' section suggests using revert to return to a historical revision. It first suggests using revert to handle a mistaken change in the working directory, but then goes on to suggest revert as a general mechanism for returning to an arbitrary earlier revision. I think this is not the intended use of revert, and that recommending update would be better.

Rati