Update cheatsheets

groff

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# groff
+
+> GNU replacement for the `troff` and `nroff` typesetting utilities.
+> More information: <https://www.gnu.org/software/groff>.
+
+- Format output for a PostScript printer, saving the output to a file:
+
+`groff {{path/to/input.roff}} > {{path/to/output.ps}}`
+
+- Render a man page using the ASCII output device, and display it using a pager:
+
+`groff -man -T ascii {{path/to/manpage.1}} | less --RAW-CONTROL-CHARS`
+
+- Render a man page into an HTML file:
+
+`groff -man -T html {{path/to/manpage.1}} > {{path/to/manpage.html}}`
+
+- Typeset a roff file containing [t]ables and [p]ictures, using the [me] macro set, to PDF, saving the output:
+
+`groff {{-t}} {{-p}} -{{me}} -T {{pdf}} {{path/to/input.me}} > {{path/to/output.pdf}}`
+
+- Run a `groff` command with preprocessor and macro options guessed by the `grog` utility:
+
+`eval "$(grog -T utf8 {{path/to/input.me}})"`