Fix typo in `expressions/match-expr.md`
@@ -113,7 +113,7 @@ let message = match maybe_digit {
```
> Note: Multiple matches using the `|` operator can cause the pattern guard and
-> and side effects it has to execute multiple times. For example:
+> the side effects it has to execute multiple times. For example:
>
> ```rust
> # use std::cell::Cell;
