Refactor process_init_stack to not surpass 80 character limit

src/userprog/process.c

@@ -162,7 +162,7 @@ process_init_stack (char *saveptr, void **esp, char *file_name)
     size_t argv_size = sizeof (char **);
     size_t argc_size = sizeof (int);
     size_t return_addr_size = sizeof (void *);
-    size_t remaining_size = align_size + argv_data_size + argv_size + argc_size 
+    size_t remaining_size = align_size + argv_data_size + argv_size + argc_size
                             + return_addr_size;
 
     /* If pushing the rest of the data required for the stack would cause