Fix bug where optimization would lead to strange line breaks.

Before:
  void f() {
    CHECK_EQ(aaaa, (
                       *bbbbbbbbb)->cccccc)
        << "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq";
  }

After:
  void f() {
    CHECK_EQ(aaaa, (*bbbbbbbbb)->cccccc)
        << "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq";
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195240 91177308-0d34-0410-b5e6-96231b3b80d8