Made doctest actually valid

README.md

@@ -1,4 +1,4 @@
-```ignore
+```text
 This crate does no require nor std nor alloc. You're welcome ❤️
 ```
 
@@ -44,7 +44,8 @@ etc
 
 [`generic_array`] implements arrays sized via `ArrayLength` trait implementors. Namely, it is implemented for `typenum` types, allowing creating an array sized as sum of two other arrays:
 
-```rust,ignore
+```rust
+# use generic_array::{sequence::Concat, GenericArray};
 // some normal rust arrrays
 let arr1: [i32; 3] = [1, 2, 3];
 let arr2: [i32; 2] = [3, 5];