*What version of crane are you running, and what are your clutsters+platform*
crane:
Version: v0.0.3
crane-lib:
Version: v0.0.5

*What did you expect to happen?*

*What actually happened?*

*Please include any relevant logs or errors*
Typos:
1. Example is mispelled: "An eample is --as-extras key=string1,string2;key2=string3"
2. Should be "to impersonate"?: "The group to impersonation."
2. Should be "to impersonate"?: "The user to impersonation."