restore missing dict check
revert #15550
Remove incorrect documentation in aptpkg.purge

Fixes #15529
Clarify region settings in ec2 config docs
Merge pull request #15893 from rallytime/ec2_config_docs

Clarify region settings in ec2 config docs
Merge pull request #15883 from thatch45/dunder_kwargs

revert #15550
Merge pull request #15882 from thatch45/if_fix_ssh

restore missing dict check
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error
Fix sphinx build error