Question : What is the Cisco CLI Command to list which phones are off the hook, on a call, etc?

I'm looking for the Cisco CLI command that will list all active ephones and display a summary their status (i.e. off hook, on call, etc).

Answer : What is the Cisco CLI Command to list which phones are off the hook, on a call, etc?

It purely depends upon the Coding Standard defined in your Organization.
If you follow the Comments options available in SSMS or Visual Studio, then it would do a line comment by default

If you want to comment a block of code, then block comment will look good..