Move rollup description earlier
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d6253dc..ee56f5b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -154,6 +154,15 @@
will run all the tests on every platform we support. If it all works out,
[@bors][bors] will merge your code into `master` and close the pull request.
+Depending on the scale of the change, you may see a slightly different form of `r+`:
+
+ @bors r+ rollup
+
+The additional `rollup` tells [@bors][bors] that this change is eligible for to be
+"rolled up". Changes that are rolled up are tested and merged at the same time, to
+speed the process up. Typically only small changes that are expected not to conflict
+with one another are rolled up.
+
[rust-highfive]: https://github.com/rust-highfive
[steveklabnik]: https://github.com/steveklabnik
[bors]: https://github.com/bors
@@ -298,18 +307,8 @@
Documentation improvements are very welcome. The source of `doc.rust-lang.org`
is located in `src/doc` in the tree, and standard API documentation is generated
-from the source code itself.
-
-Documentation pull requests function in the same way as other pull requests,
-though you may see a slightly different form of `r+`:
-
- @bors r+ rollup
-
-That additional `rollup` tells [@bors][bors] that this change is eligible for a 'rollup'.
-To save [@bors][bors] some work, and to get small changes through more quickly, when
-[@bors][bors] attempts to merge a commit that's rollup-eligible, it will also merge
-the other rollup-eligible patches too, and they'll get tested and merged at
-the same time.
+from the source code itself. Documentation pull requests function in the same way
+as other pull requests.
To find documentation-related issues, sort by the [T-doc label][tdoc].
