torch.x -- document dict argument parsing failure case when value contains "="

[dracifer]

Summary: in some cases, the value can contain "=". For example, some base64 encoded values as environment variable. torch.x parser currently does not support this case.

adding a test to capture this failure. wonder if we should consider support this. An example use case can be parsing temp AWS token credential to ddp

also correct a documentation copy-pasta

Reviewed By: kiukchung

Differential Revision: D35560931

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D35560931

[codecov[bot]]

Codecov Report

Merging #469 (16433f0) into main (05a7a8b) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #469   +/-   ##
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  Coverage   94.61%   94.61%           
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  Files          65       65           
  Lines        3862     3862           
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  Hits         3654     3654           
  Misses        208      208           

Impacted Files	Coverage Δ
torchx/schedulers/docker_scheduler.py	95.81% <ø> (ø)

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