[latexrefman] Splitting the input

[Hefferon, Jim S.]

I added more to the discussion of the \input and \inputonly commands.  This seems to be something that beginners do not get.

I combined the two because they are so closely linked that I was saying "see the other" a lot.  I added \endinput also, and added a prototype in the "Splitting the input" section.

Jim

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https://www.youtube.com/watch?v=d7Uy0Uznw4E