http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57714
--- Comment #8 from David Krauss <potswa at mac dot com> ---
Probably what happened:
1. In preserving visual appearance, tokens not separated by spaces are kept
together.
2. Line splicing happens before spaces are identified for the above.
3. The { and return tokens are grouped into the same visual block.
4. 0 follows a space and its location on the next line is duly noted.
