tree-wide: make ++/-- usage consistent WRT spacing

Throughout the tree there's spurious use of spaces separating ++ and --
operators from their respective operands.  Make ++ and -- operator
consistent with the majority of existing uses; discard the spaces.

src/initctl/initctl.c

@@ -314,7 +314,7 @@ static int server_init(Server *s, unsigned n_sockets) {
                 f->fd = fd;
                 LIST_PREPEND(fifo, s->fifos, f);
                 f->server = s;
-                s->n_fifos ++;
+                s->n_fifos++;
         }
 
         r = bus_connect_system_systemd(&s->bus);