== Rationale for removing Lua  from Template:Incomplete/doc == 

 I would like to understand why  was removed from the documentation. 
 The first line of  contains 
  #invoke:Unsubst 
 which does invoke Lua. However, that was a wrapper around the body of the template that was not converted to Lua. Is that why? How can one tell which invocation is spurious and which is not? Does the entire template have to invoke a complete Lua substitute? Just curious?  

 PS. I'm fairly new at discussions and didn't know whether to post this general question here or on the template's talk page.