RFR: CODETOOLS-7901115: webrev -N -r generates broken patch files

[Bengt Rutisson]

Hi everyone,

Can I have a couple of reviews for this change to fix a P1 issue in the 
webrev script? I also need a sponsor to push the change.

http://cr.openjdk.java.net/~brutisso/CODETOOLS-7901115/webrev.00/
https://bugs.openjdk.java.net/browse/CODETOOLS-7901115

There are some details for what is happening in the bug report. The 
conclusion is that the problem was introduced by this change:

http://hg.openjdk.java.net/code-tools/webrev/rev/09eb35524f9a

Since this is a feature (a good feature in my opinion) but causes 
problems we decided that the easiest way forward is to just back out 
this change now to make sure we can trust the generated patch files 
again. Later we can try to implement the feature to generate hg exports 
for "webrev -r" again.

So, the changes proposed in this review request basically just undoes 
what was done for 09eb35524f9a.

Thanks,
Bengt