1 02/21/85 is_he_user
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 4 Syntax as an active function:  [is_he_user Person_id]
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 7 Function:  function returns "true" if its argument is the name of a
 8 user in the URF hash table (urf.ht) in the current working directory;
 9 it returns "false" otherwise.
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12 Notes:  The function is used in the master.ec segment to detect errors
13 in the input arguments.