Update errors1.rs - Add Result type signature as it is difficult for new comers to understand Generics and Error all at once.

[veggiemonk]

Add Result type signature as it is difficult for new comers to understand Generics and Error all at once.

At first, I tried Result<String, Error> and got this.

error[E0412]: cannot find type `Error` in this scope
 --> exercises/error_handling/errors1.rs:9:62
  |
9 | pub fn generate_nametag_text(name: String) -> Result<String, Error> {
  |                                                              ^^^^^ not found in this scope
help: possible candidates are found in other modules, you can import them into scope
  |
1 | use std::error::Error;
  |
1 | use std::fmt::Error;
  |
1 | use std::io::Error;
  |

In the book, it talks about std::io::Error with Result which is a bit confusing. See https://doc.rust-lang.org/book/ch09-02-recoverable-errors-with-result.html

It took me a long time to understand that Result can take whatever type as a second argument.

Let me know your thoughts on how to improve this.

[komaeda]

thanks!