The links to examples on the website don't work
Author: ekdnam
Pull request: no
Labels: name: wontfix

## Environment info
<!-- You can run the command `transformers-cli env` and copy-and-paste its output below.
     Don't forget to fill out the missing fields in that output! -->
     
I am looking at the examples part of the docs: https://huggingface.co/transformers/v2.2.0/examples.html

The references to all the scripts on the web page don't work. 

for ex: [link to script](https://github.com/huggingface/transformers/blob/master/examples/run_ner.py) referenced [here](https://huggingface.co/transformers/v2.2.0/examples.html#named-entity-recognition)

Thanks in advance!

Here, 
- `transformers` version:
- Platform:
- Python version:
- PyTorch version (GPU?):
- Tensorflow version (GPU?):
- Using GPU in script?:
- Using distributed or parallel set-up in script?:

### Who can help
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 albert, bert, GPT2, XLM: @LysandreJik 
 tokenizers: @mfuntowicz
 Trainer: @sgugger
 Speed and Memory Benchmarks: @patrickvonplaten
 Model Cards: @julien-c
 Translation: @sshleifer
 Summarization: @sshleifer
 TextGeneration: @TevenLeScao 
 examples/distillation: @VictorSanh
 nlp datasets: [different repo](https://github.com/huggingface/nlp)
 rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)
 Text Generation: @TevenLeScao
 blenderbot: @mariamabarham
 Bart: @sshleifer
 Marian: @sshleifer
 T5: @patrickvonplaten
 Longformer/Reformer: @patrickvonplaten
 TransfoXL/XLNet: @TevenLeScao 
 examples/seq2seq: @sshleifer
 examples/bert-loses-patience: @JetRunner
 tensorflow: @jplu
 examples/token-classification: @stefan-it
 documentation: @sgugger
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## Information

Model I am using (Bert, XLNet ...):

The problem arises when using:
* [ ] the official example scripts: (give details below)
* [ ] my own modified scripts: (give details below)

The tasks I am working on is:
* [ ] an official GLUE/SQUaD task: (give the name)
* [ ] my own task or dataset: (give details below)

## To reproduce

Steps to reproduce the behavior:

1.
2.
3.

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## Expected behavior

<!-- A clear and concise description of what you would expect to happen. -->


Comments:
Hello! Indeed, you're right. This is because you're looking at an older version of the docs, and the files have since moved around. When clicking on a link, you should replace `master` with `v2.2.0` to get the correct link. For example:

```
https://github.com/huggingface/transformers/blob/master/examples/run_lm_finetuning.py
```

should become:

```
https://github.com/huggingface/transformers/blob/v2.2.0/examples/run_lm_finetuning.py
```

Sorry for the inconvenience.

I don't think there's much we can do about older versions, but we could freeze the current and future scripts to tag versions cc @sgugger.

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.