10564b1175
groff 1.23.0 added .MR to its -man macro package. The NEWS file states
that the inclusion of the macro "was prompted by its introduction to
Plan 9 from User Space's troff in August 2020." From d32deab it seems
that the name for Plan 9 from User Space's implementation was suggested
by groff maintainer G. Brandon Robinson.
Not sure if the intention was to make these definitions compatible, but
it would be nice if they were.
Currently, Plan 9 from User Space's .MR expects its second argument to
be parenthesized. groff's .MR does not. This results in extra
parentheses appearing in manual references when viewing Plan 9 from User
Space's manual pages on a system using groff.
58 lines
987 B
Groff
58 lines
987 B
Groff
.TH COL 1
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.SH NAME
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col \- column alignment
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.SH SYNOPSIS
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.B col
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[
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.B -bfx
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]
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.SH DESCRIPTION
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.I Col
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overlays lines to expunge reverse line feeds
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(ESC-7)
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and half line feeds (ESC-9 and ESC-8)
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as produced by
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.I nroff
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for .2C in
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.MR ms 7
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or
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.MR man 7
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and for
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.MR tbl 1 .
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.I Col
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is a pure filter.
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It normally emits only full line feeds;
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option
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.B -f
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(fine) allows half line feeds too.
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Option
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.B -b
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removes backspaces, printing just one of each pile of overstruck
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characters.
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.I Col
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normally converts white space to tabs;
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option
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.B -x
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overrides this feature.
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Other escaped characters and non-printing characters are ignored.
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.SH EXAMPLES
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.TP
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.L
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tbl file | nroff -ms | col | p
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Format some tables for printing on typewriters;
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use
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.I col
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to remove reverse line feeds, and
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paginate the output.
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.SH SOURCE
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.B \*9/src/cmd/col.c
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.SH SEE ALSO
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.MR pr 1
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.SH BUGS
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.I Col
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can't back up more than 128 lines or
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handle more than 800 characters per line,
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and understands
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.L VT
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(013) as reverse line feed.
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