title: What are valid characters and how to escape in clap.rs arguments?
body: <p>I want to pass in some shape or form a dictionary/map/object into my clap app. I can preprocess the dict to turn it into some csv or whatever. My problem is that I cannot find in clap docs which characters are valid for the argument values and how to escape them. Is this unrelated to clap and instead shell specific?</p>
  <p>Can I pass something like</p>
  <p><code>myApp --dicty=&quot;a=1,b=3,qwe=yxc&quot;</code></p>
  <p>?</p>