fix: revert example code

Author: shenxianpeng

testing/good.c

@@ -1,8 +1,6 @@
 #include <stdio.h>
-int main()
-{
-    for (;;)
-        break;
-    printf("Hello world!\n");
-    return 0;
-}
+int main() {
+  for (;;) break;
+  printf("Hello world!\n");
+  return 0;
+}

testing/main.c

@@ -1,8 +1,2 @@
 #include <stdio.h>
-int main()
-{
-    for (;;)
-        break;
-    printf("Hello world!\n");
-    return 0;
-}
+int main() {for (;;) break; printf("Hello world!\n");return 0;}