How to denote required and optional arguments on the command line

Note

Zsh does not expand the tilde (~) in single or double quotes.

initial tildes and equals signs are not expanded http://zsh.sourceforge.net/Guide/zshguide05.html

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apt.md		apt.md
awk.md		awk.md
base64.md		base64.md
binary.md		binary.md
curl.md		curl.md
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ffmpeg-and-ffprobe.md		ffmpeg-and-ffprobe.md
gradle.md		gradle.md
imagemagick.md		imagemagick.md
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npm.md		npm.md
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protoc.md		protoc.md
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