GitHub user felixcheung opened a pull request:
https://github.com/apache/spark/pull/15790
[SPARK-18264][SPARKR] update vignettes for CRAN release build and add info
on release
## What changes were proposed in this pull request?
Changes to DESCRIPTION to build vignettes.
Changes the metadata for vignettes to generate the recommended format.
Unfortunately it looks not as nice as before
(before - left, after - right)


Also add information on how to run build/release to CRAN later.
## How was this patch tested?
manually, unit tests
@shivaram
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/felixcheung/spark rpkgvignettes
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15790.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15790
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commit d51b04b4d2eb4000563d99250970ae9b3653952c
Author: Felix Cheung <[email protected]>
Date: 2016-11-06T18:16:20Z
update vignettes for release build and add info on release
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