* Fix SC2006: Use $(...) notation instead of legacy backticked `...`.
* Fix SC2016: Expressions don't expand in single quotes, use double quotes for that.
* Fix SC2046: Quote this to prevent word splitting.
* Fix SC2053: Quote the right-hand side of == in [[ ]] to prevent glob matching.
* Fix SC2068: Double quote array expansions to avoid re-splitting elements.
* Fix SC2086: Double quote to prevent globbing and word splitting.
* Fix SC2102: Ranges can only match single chars (mentioned due to duplicates).
* Fix SC2140: Word is of the form "A"B"C" (B indicated). Did you mean "ABC" or "A\"B\"C"?
* Fix SC2145: Argument mixes string and array. Use * or separate argument.
* Fix SC2209: warning: Use var=$(command) to assign output (or quote to assign string).
Co-authored-by: Mehrdad <noreply@github.com>
* add pages about examples on training language models with fairseq and ray autoscaler
* better format
* update ray_train.sh
* Move EFS to the autoscaler file
* nits
* add comments to the code & use a new way to implement checkpoint hook
* small bug fix
* polish the doc
* fix formatting
* yaml
* update docs
* fix the bugs and add preprocess.sh
* fix lint
* Reduce batch size & fix lint
* shorttitle
