Using a different loop induction variable than the enclosing scope.  No functional changes intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187159 91177308-0d34-0410-b5e6-96231b3b80d8
Phabricator.rst: tiny fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187164 91177308-0d34-0410-b5e6-96231b3b80d8