IDL Problem Code 54 with alias docs-invalid-required

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Documentation Best Practice

This problem indicates that there's an opportunity to improve the documentation for your code.

This helps make sure the extension can properly detect types, provide a better user experience, and ensures other users can be successful with code that you write.

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This problem indicates that the documentation for a parameter (argument or keyword) is not either required or optional.

Here's an example that highlights the problem:

;+
; :Returns: Number
;
; :Arguments:
;   arg: in, 42, Number
;     My favorite arg
;
;-
function myfunc, arg
  compile_opt idl2
  return, 42 + arg
end

To fix the issue, adjust the docs to be one of the following:

Required parameter

;+
; :Returns: Number
;
; :Arguments:
;   arg: in, required, Number
;     My favorite arg
;
;-
function myfunc, arg
  compile_opt idl2
  return, 42 + arg
end

Optional parameter

;+
; :Returns: Number
;
; :Arguments:
;   arg: in, optional, Number
;     My favorite arg
;
;-
function myfunc, arg
  compile_opt idl2
  return, 42 + arg
end