Finding the Delta for First Revision on a Branch

[Jake Colman]

I need to see what was changed for a file that is the first revision on a
branch.  This means I need to compare it to the prior revision which is the
revision from which this branch was cut.  What is the deterministic way of
inferring the head revision of the module on the branch?

In other words, I need to determine what was modified to create revision
1.205.6.1.  This is the first revision on its branch.  What is the prior
revision?  Is it 1.205?  Is it always the first two parts of the revision?

Thanks!

-- 
Jake Colman                     

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