Clarify last element in str.{r,}splitn documentation
An attempt at #36202.
I'm not sure if my wording is actually clearer, to be honest...
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|---|---|---|
| .. | ||
| btree | ||
| binary_heap.rs | ||
| borrow.rs | ||
| Cargo.toml | ||
| enum_set.rs | ||
| fmt.rs | ||
| lib.rs | ||
| linked_list.rs | ||
| macros.rs | ||
| range.rs | ||
| slice.rs | ||
| str.rs | ||
| string.rs | ||
| vec.rs | ||
| vec_deque.rs | ||