Expand Phabricator docs slightly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241161 91177308-0d34-0410-b5e6-96231b3b80d8

docs/Phabricator.rst

@@ -60,26 +60,28 @@ to upload your patch):
 To upload a new patch:
 
 * Click *Differential*.
-* Click *Create Diff*.
-* Paste the text diff or upload the patch file.
-  Note that TODO
+* Click *+ Create Diff*.
+* Paste the text diff or browse to the patch file. Click *Create Diff*.
+* Leave the Repository field blank.
 * Leave the drop down on *Create a new Revision...* and click *Continue*.
 * Enter a descriptive title and summary.  The title and summary are usually
   in the form of a :ref:`commit message <commit messages>`.
 * Add reviewers and mailing
   lists that you want to be included in the review. If your patch is
-  for LLVM, add llvm-commits as a subscriber; if your patch is for Clang,
+  for LLVM, add llvm-commits as a Subscriber; if your patch is for Clang,
   add cfe-commits.
+* Leave the Repository and Project fields blank.
 * Click *Save*.
 
 To submit an updated patch:
 
 * Click *Differential*.
-* Click *Create Diff*.
-* Paste the updated diff.
+* Click *+ Create Diff*.
+* Paste the updated diff or browse to the updated patch file. Click *Create Diff*.
 * Select the review you want to from the *Attach To* dropdown and click
   *Continue*.
-* Click *Save*.
+* Leave the Repository and Project fields blank.
+* Add comments about the changes in the new diff. Click *Save*.
 
 Reviewing code with Phabricator
 -------------------------------