Format code of vfscount.py

tools/vfscount.py

@@ -25,7 +25,7 @@ struct key_t {
 
 BPF_HASH(counts, struct key_t, u64, 256);
 
-    int do_count(struct pt_regs *ctx) {
+int do_count(struct pt_regs *ctx) {
     struct key_t key = {};
     u64 zero = 0, *val;
     key.ip = PT_REGS_IP(ctx);