parse-datetime, tests: don't use "string" + int Recent versions of 'clang' complain about C source code that uses expressions of the form '"string literal" + integer', I guess on the theory that it's confusing for readers who are used to C++. On those grounds I suppose it's OK to make this minor style change. * lib/parse-datetime.y (parse_datetime): * tests/test-fchdir.c (main): * tests/test-snprintf-posix.h (test_function): * tests/test-snprintf.c (main): * tests/test-vasnprintf-posix.c (test_function): * tests/test-vasnprintf.c (test_function): * tests/test-vsnprintf.c (main): * tests/unistdio/test-ulc-asnprintf1.h (test_function): Rewrite '"str" + E' to '&"str"[E]'.