[cli] Automatically add .hcl extension to generated var-files. #457
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Description
Since the generate var-file command writes its output in HCL and the var-file flag requires them, we should probably go ahead and add the extension if it's not set properly. The second and third commits are a little cleanup that was missing and a fix to tighten up the help text and remove some copypasta.
Reminders
CHANGELOG.md
entry