Fixes PR17018. Only partial test coverage because I don't want
to try to write a test which generates a file whose name contains a newline.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189557 91177308-0d34-0410-b5e6-96231b3b80d8
- This diverges from gcc, and confuses tools (like dtrace) which track # line
markers as a way to determine which content is in the context of the main
file.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168128 91177308-0d34-0410-b5e6-96231b3b80d8
Eli Friedman