terminology shared, unified, integrated

[John Yates]

I fumble-fingered earlier and send the note below to Aaron alone
instead of to the full list.  Aaron pointed out my mistake and added:

  "I think 'Common' is the best of these."

/john

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Aaron Bentley writes:

> Integrated and unified both sound like they mean that the repositories
> are part of the branches, not shared among them.

Still groping.  Additional alternatives:

  - common repository
  - factored repository
  - joint repository

/john