Added handling of unicode escapes to the preprocessor. They are now decoded in all identifiers. This also fixes escaped newlines in the middle of identifiers. (The only context where escaped newlines doesn't work now is afaik in the middle of cpp directives like "#include" and "#ifdef".) Rev: src/cpp.c:1.154 Rev: src/preprocessor.h:1.81 Rev: src/testsuite.in:1.747