clang-format: Fix assertion on incomplete string literals.

Before, this could would lead to an assert:
  llvm::errs() << "
               << a;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191639 91177308-0d34-0410-b5e6-96231b3b80d8
Fix misspelling of -fmodules-decluse.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191640 91177308-0d34-0410-b5e6-96231b3b80d8