basic: define HEXDIGITS

define HEXDIGITS alongside DIGITS, and use it where it's already useful.  We'll
use it again shortly when parsing MAC addresses.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/test-fileio.c b/src/test/test-fileio.c
index ec9f173da2..79609765e0 100644
--- a/src/test/test-fileio.c
+++ b/src/test/test-fileio.c
@@ -289,7 +289,7 @@ static void test_capeff(void) {
 
                 assert_se(r == 0);
                 assert_se(*capeff);
-                p = capeff[strspn(capeff, DIGITS "abcdefABCDEF")];
+                p = capeff[strspn(capeff, HEXDIGITS)];
                 assert_se(!p || isspace(p));
         }
 }