A couple minor edit changes

src/serial.c

@@ -590,7 +590,7 @@ int HAMLIB_API serial_setup(hamlib_port_t *rp)
  */
 int HAMLIB_API serial_flush(hamlib_port_t *p)
 {
-    rig_debug(RIG_DEBUG_VERBOSE, "%s MDB called\n", __func__);
+    rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
 
     if (p->fd == uh_ptt_fd || p->fd == uh_radio_fd)
     {

tests/rigctld.c

@@ -522,7 +522,7 @@ int main(int argc, char *argv[])
 
     if (!vfo_mode)
     {
-        printf("Recommend using --vfo switch for rigctld if clients supports it\n");
+        printf("Recommend using --vfo switch for rigctld if client supports it\n");
         printf("rigctl and netrigctl will automatically detect vfo mode\n");
     }