[Torchscript] Fix docs

[patrickvonplaten]

Fixes #6714

[codecov]

Codecov Report

Merging #6740 into master will decrease coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6740      +/-   ##
==========================================
- Coverage   80.00%   79.70%   -0.30%     
==========================================
  Files         156      156              
  Lines       28426    28426              
==========================================
- Hits        22741    22656      -85     
- Misses       5685     5770      +85     

Impacted Files	Coverage Δ
src/transformers/tokenization_marian.py	66.66% <0.00%> (-32.50%)	⬇️
src/transformers/tokenization_xlnet.py	66.66% <0.00%> (-23.43%)	⬇️
src/transformers/tokenization_reformer.py	81.66% <0.00%> (-13.34%)	⬇️
src/transformers/tokenization_openai.py	71.21% <0.00%> (-12.88%)	⬇️
src/transformers/tokenization_dpr.py	57.65% <0.00%> (+4.50%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 64c7c2b...02d9292. Read the comment docs.

[LysandreJik]

Nice!