IDL Problem Code 39 with alias no-idl2

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Best Practice

For modern IDL programming, compile_opt idl2 is a must to help prevent common mistakes and normalize how people should write their IDL code.

Some compile_opt errors are automatically fixed on save (when configured).

Here's an example of how to reproduce the error:

pro myPro
  compile_opt hidden
  ; ^^^^^^^^^^^^^^^^ missing idl2

  ; ... logic

end

Which you can fix by adding in idl2 as a compile opt:

pro myPro
  compile_opt idl2, hidden

  ; ... logic

end