[Bug c++/57757] CPP extra inserted whitespace needs to be reviewed for C++11 user-defined literals

[harald at gigawatt dot nl]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57757

--- Comment #4 from Harald van Dijk <harald at gigawatt dot nl> ---
It looks like this is a simple matter of adding an extra case in
libcpp/lex.c:cpp_avoid_paste, returning true for (CPP_STRING, CPP_NAME) when
UDLs are enabled. (I'd attach a working patch instead of a brief one-sentence
description, but won't because I unfortunately expect copyright assignment
would be a problem.)