1 03/05/76 add_line_numbers, aln
 2 
 3 Function: adds a new set of line numbers to the specified segment.
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 5 
 6 Syntax:  aln {path} {new_number increment}
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 8 
 9 Arguments:
10 path   pathname of segment; if omitted, temporary text is used.
11 
12 new_number   first line to be added (default is 100).
13 
14 increment   increment used to derive subsequent line numbers; can
15 only be used with new_number  (default is 10).
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