examples: Don't print weird characters

examples/general.c

@@ -76,8 +76,7 @@ int main (int argc, char** argv)
   git_oid_fromstr(&oid, hex);
 
   // Once we've converted the string into the oid value, we can get the raw
-  // value of the SHA.
-  printf("Raw 20 bytes: [%.20s]\n", (&oid)->id);
+  // value of the SHA by accessing `oid.id`
 
   // Next we will convert the 20 byte raw SHA1 value to a human readable 40
   // char hex value.