smichr/sympy — comment on commit a00f5e8c5ffec22f2a15acc2b105478cca9a6619
File:  line 0
By asmeurer:

This sentence from the commit message:

```
An _eval_subs routine only needs to be written if an object nees more
than a rebuilding of subs attempts on its arguments.
```

I think must have a typo, because it doesn't sound right to me. Also, you misspelled needs.