Repository: huggingface/tokenizers (language: rust)

Issue:
README.md contains non-functional code
The README.md (and the corresponding landing page of the documentation) contains non-functional code. Specifically the following:

### Loading a pretrained tokenizer from the Hub
```rust
use tokenizers::tokenizer::{Result, Tokenizer};

fn main() -> Result<()> {
    # #[cfg(feature = "http")]
    # {
        let tokenizer = Tokenizer::from_pretrained("bert-base-cased", None)?;

        let encoding = tokenizer.encode("Hey there!", false)?;
        println!("{:?}", encoding.get_tokens());
    # }
    Ok(())
}
```

Here, the function to load the tokenizer from a pretrained model is not available in 'Tokenizer':

```
error[E0599]: no function or associated item named `from_pretrained` found for struct `Tokenizer` in the current scope
   --> src/main.rs:30:32
    |
30  |     let tokenizer = Tokenizer::from_pretrained("bert-base-cased", None);
    |                                ^^^^^^^^^^^^^^^ function or associated item not found in `Tokenizer`
```



Discussion / hints:
Hey! You have to enbale the `https` features for that 🤗 Should we clarify the doc about this? 
Hey! That makes sense! A small hint wouldn't hurt ;) 

Fix patch:
diff --git a/tokenizers/README.md b/tokenizers/README.md
index ef014c0c9..cac7b5868 100644
--- a/tokenizers/README.md
+++ b/tokenizers/README.md
@@ -42,10 +42,11 @@ use tokenizers::tokenizer::{Result, Tokenizer};
 fn main() -> Result<()> {
     # #[cfg(feature = "http")]
     # {
-        let tokenizer = Tokenizer::from_pretrained("bert-base-cased", None)?;
+    // needs http feature enabled
+    let tokenizer = Tokenizer::from_pretrained("bert-base-cased", None)?;
 
-        let encoding = tokenizer.encode("Hey there!", false)?;
-        println!("{:?}", encoding.get_tokens());
+    let encoding = tokenizer.encode("Hey there!", false)?;
+    println!("{:?}", encoding.get_tokens());
     # }
     Ok(())
 }


Test patch: