https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91085
--- Comment #15 from Bruce Korb <bkorb at gnu dot org> ---
Obviously, "print_quote()" was needed early on (1999) and then saved for
prosperity :). Your patch is inadequate because it will have to not expand
'linux' in a line such as:
#if __has_include(<linux/foo.h>)
In other words, it will have to skip over three flavors of quote. Or just two,
if you omit apostrophe quotes. In any event, the '<' character will have to be
matched with '>', which is a tiny change to the logic.
Don't forget to add tests in the final result.
