Use pop_back_val() instead of both back() and pop_back().
No functionality change intended.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189112 91177308-0d34-0410-b5e6-96231b3b80d8
Revise -Wnewline-eof test per feedback from Dmitri.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189113 91177308-0d34-0410-b5e6-96231b3b80d8