The title of this section should be enclosed in backticks (to show that the try macro is code). How about wording like this for this paragraph:

> Explicit pattern matching on `IoResult`s often gets quite verbose, especially when many I/O operations are being performed. Some examples (like those above) are alleviated with extra methods implemented on `IoResult`, but others have more complex interdependencies among each I/O operation.
>
> The `try!` macro from `std::macros` is provided as a method of early-return inside `Result`-returning functions. It expands to an early-return on `Err` and otherwise unwraps the wrapped `Ok` value.