clang-format: Fix indentation in multi-line placement new.

Before:
  auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =
      new (aaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaa))
      typename aaaaaaaaaaaaaaaaaaaaaaaa();

After:
  auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =
      new (aaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaa))
          typename aaaaaaaaaaaaaaaaaaaaaaaa();

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214964 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Add special comments to disable formatting.

With this patch:
  int ThisWillBeFormatted;
  // clang-format off
  int   ThisWontBeFormatted;
  // clang-format on
  int Formatted;

This is for regions where a significantly nicer code layout can be found
knowing the content of the code.

This fixes llvm.org/PR20463.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214966 91177308-0d34-0410-b5e6-96231b3b80d8
Fix sphinx warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214967 91177308-0d34-0410-b5e6-96231b3b80d8