as.info: Include

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`.include "FILE"'

   This directive provides a way to include supporting files at
specified points in your source program.  The code from FILE is
assembled as if it followed the point of the `.include'; when the end
of the included file is reached, assembly of the original file
continues.  You can control the search paths used with the `-I'
command-line option (*note Command-Line Options: Invoking.).  Quotation
marks are required around FILE.