Wrapped a line such that it does not exceed 100 characters.

Author: Christian

src/libcore/convert.rs

@@ -291,7 +291,8 @@ pub trait Into<T>: Sized {
 /// When constructing a function that is capable of failing, the return type
 /// will generally be of the form `Result<T, E>`.
 /// The `From` trait simplifies error handling by allowing a function to return a single error type
-/// that encapsulate multiple error types. See the "Examples" section and [the book][book] for more details.
+/// that encapsulate multiple error types. See the "Examples" section
+/// and [the book][book] for more details.
 ///
 /// **Note: This trait must not fail**. If the conversion can fail, use [`TryFrom`].
 ///