Update README.md

README.md

@@ -41,7 +41,7 @@ Strum has implemented the following macros:
 
     Here is an example of the code generated by deriving `EnumString`.
 
-    ```
+    ```rust
     extern crate strum;
     #[macro_use] extern crate strum_macros;
     #[derive(EnumString)]
@@ -186,7 +186,7 @@ applied to a variant by adding #[strum(parameter="value")] to the variant.
    The generated code will now return the variant with the input string captured as shown below
    instead of failing.
 
-    ```ignore
+    ```rust,ignore
     // Replaces this:
     _ => Err(strum::ParseError::VariantNotFound)
     // With this in generated code: