islower           916 maint/gnulib/lib/dfa.c   {"lower", islower, false},
islower          3504 maint/gnulib/lib/regcomp.c     BUILD_CHARCLASS_LOOP (islower);
islower            44 maint/gnulib/tests/test-c-ctype.c           ASSERT (c_islower (c) == (islower (c) != 0));