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groff - Text markup language

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groff is a text markup language created in 1990.

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Groff (GNU troff) is a typesetting system that reads plain text mixed with formatting commands and produces formatted output. Output may be PostScript or PDF, html, or ASCII/UTF8 for display at the terminal. Formatting commands may be either low-level typesetting requests (“primitives”) or macros from a supplied set. Users may also write their own macros. All three may be combined.

Example from the web:
.sp 1.5i My thoughts on the subject .sp

Language features

Feature Supported Token Example
MultiLine Comments .ig
text text text...
This is part of a large block
of text that has been
temporarily(?) commented out.

We can restore it simply by removing
the .ig request and the ".." at the
end of the block.
.de P
.  br
.  sp .8v
\" comment
\# comment
express.html · groff.html · cesil.html

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