Missing search.to_lowercase() in grep_case_insensitive
@@ -168,6 +168,8 @@ number when we sent you chapter 12, we will fix it. /Carol -->
```rust
fn grep_case_insensitive<'a>(search: &str, contents: &'a str) -> Vec<&'a str> {
+ let search = search.to_lowercase();
+
contents.lines()
.filter(|line| {
line.to_lowercase().contains(&search)
