Explicitly specify the Result type

[danielschemmel]

The name Result is evaluated in the user context, which may break when another Result type is used. For example, in the presence of the basic error-chain quickstart, this leads to:

   Compiling application v0.0.1 (/home/ghast/rust-cli-template)
error[E0107]: wrong number of type arguments: expected 1, found 2
  --> src/main.rs:13:10
   |
13 | #[derive(structopt::StructOpt, Debug)]
   |          ^^^^^^^^^^^^^^^^^^^^ unexpected type argument

error: aborting due to previous error

For more information about this error, try `rustc --explain E0107`.
error: Could not compile `application`.

By explicitly specifying the Result type, this name clash can be resolved correctly.

[TeXitoi]

Thanks