[Bug preprocessor/86079] preprocessor fails to splice lines

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86079

--- Comment #6 from Andreas Schwab <schwab@linux-m68k.org> ---
In C mode, with line numbers, the newlines are required to preserve the line
number of the tokens.