1 03/18/76  list, lis; listnh, lisn
 2 
 3 Function:  displays information contained in the current file alone,
 4  the alter file alone, or of the current file after merging with the
 5  alter file.  With list or lis, header information precedes listing;
 6  with listnh or lisn, header is suppressed.
 7 
 8 Syntax:  list {file} {line_number}
 9 
10 
11 Arguments:
12 file  identifies file to be listed; may be current, cur, alter, or alt.
13  If not given, current file (after merging with alter file) is iisted.
14 
15 line_number  line number at which printing begins.  If not given,
16  entire file is printed.