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Diff for /src/usr.bin/col/col.1 between version 1.3 and 1.4

version 1.3, 1998/09/23 04:32:37 version 1.4, 1999/06/05 01:21:21
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 .Op Fl bfx  .Op Fl bfx
 .Op Fl l Ar num  .Op Fl l Ar num
 .Sh DESCRIPTION  .Sh DESCRIPTION
 .Nm col  .Nm
 filters out reverse (and half reverse) line feeds so that the output is  filters out reverse (and half-reverse) line feeds so that the output is
 in the correct order with only forward and half forward line  in the correct order with only forward and half-forward line
 feeds, and replaces white-space characters with tabs where possible.  feeds, and replaces whitespace characters with tabs where possible.
 This can be useful in processing the output of  This can be useful in processing the output of
 .Xr nroff 1  .Xr nroff 1
 and  and
 .Xr tbl  1 .  .Xr tbl  1 .
 .Pp  .Pp
 .Nm col  .Nm
 reads from the standard input and writes to the standard output.  reads from the standard input and writes to the standard output.
 .Pp  .Pp
 The options are as follows:  The options are as follows:
 .Bl -tag -width "-l num  "  .Bl -tag -width "-l num"
 .It Fl b  .It Fl b
 Do not output any backspaces, printing only the last character  Do not output any backspaces, printing only the last character
 written to each column position.  written to each column position.
 .It Fl f  .It Fl f
 Forward half line feeds are permitted (``fine'' mode).  Forward half-line feeds are permitted
 Normally characters printed on a half line boundary are printed  .Pf ( Ns Dq fine
   mode).
   Normally characters printed on a half-line boundary are printed
 on the following line.  on the following line.
 .It Fl x  .It Fl x
 Output multiple spaces instead of tabs.  Output multiple spaces instead of tabs.
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 .El  .El
 .Pp  .Pp
 The control sequences for carriage motion that  The control sequences for carriage motion that
 .Nm col  .Nm
 understands and their decimal values are listed in the following  understands and their decimal values are listed in the following
 table:  table:
 .Pp  .Pp
 .Bl -tag -width "carriage return" -compact  .Bl -tag -width "carriage return" -compact
 .It ESC\-7  .It ESC\-7
 reverse line feed (escape then 7)  Reverse line feed (escape then 7).
 .It ESC\-8  .It ESC\-8
 half reverse line feed (escape then 8)  Half reverse line feed (escape then 8).
 .It ESC\-9  .It ESC\-9
 half forward line feed (escape then 9)  Half forward line feed (escape then 9).
 .It backspace  .It backspace
 moves back one column (8); ignored in the first column  Moves back one column (8); ignored in the first column.
 .It carriage return  .It carriage return
 (13)  (13)
 .It newline  .It newline
 forward line feed (10); also does carriage return  Forward line feed (10); also does carriage return.
 .It shift in  .It shift in
 shift to normal character set (15)  Shift to normal character set (15).
 .It shift out  .It shift out
 shift to alternate character set (14)  Shift to alternate character set (14).
 .It space  .It space
 moves forward one column (32)  Moves forward one column (32).
 .It tab  .It tab
 moves forward to next tab stop (9)  Moves forward to next tab stop (9).
 .It vertical tab  .It vertical tab
 reverse line feed (11)  Reverse line feed (11).
 .El  .El
 .Pp  .Pp
 All unrecognized control characters and escape sequences are  All unrecognized control characters and escape sequences are
 discarded.  discarded.
 .Pp  .Pp
 .Nm col  .Nm
 keeps track of the character set as characters are read and makes  keeps track of the character set as characters are read and makes
 sure the character set is correct when they are output.  sure the character set is correct when they are output.
 .Pp  .Pp
 If the input attempts to back up to the last flushed line,  If the input attempts to back up to the last flushed line,
 .Nm col  .Nm
 will display a warning message.  will display a warning message.
 .Sh SEE ALSO  .Sh SEE ALSO
 .Xr expand 1 ,  .Xr expand 1 ,
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 .Xr tbl 1  .Xr tbl 1
 .Sh HISTORY  .Sh HISTORY
 A  A
 .Nm col  .Nm
 command appeared in  command appeared in
 .At v6 .  .At v6 .
Legend:
Removed from v.1.3  
changed lines
  Added in v.1.4