From da165f8270b7b65f0606d7277902b4eaf89dfeb2 Mon Sep 17 00:00:00 2001
From: Malin Freeborn <malinfreeborn@tutamail.com>
Date: Tue, 20 Apr 2021 21:22:17 +0200
Subject: [PATCH] add groff

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+# Basic Documents
+
+Great a file called `name.ms`, with the following content:
+
+```
+.TL
+Groff-Time
+.AU
+Ghost
+.NH
+How to Format Groff Documents.
+.PP
+Groff needs two new lines to show a new paragraph.
+
+```
+
+Then make a pdf from the document with:
+
+`groff -ems name.ms -Tpdf > name.pdf`
+
+The commands must be placed at the start of a line.
+
+The available commands are:
+
+| Result           | Command            |
+|:----------------:|:-------------------|
+| Section Header   |    .NH 1           |
+| Subsection       |    .NH 2           |
+| Subsubsection    |    .NH 3           |
+| Paragraph        |    .PP             |
+| Bold text        |    .B "text"       |
+| Italic text      |    .I "text"       |
+| Bold Italic text |    .BI "text"      |
+| Author           |    .AU             |
+| Title            |    .TL             |
+| Start abstract   |    .AB             |
+| Start an equation|    .EQ             |
+| End an equation  |    .EN             |
+
+
+## Equations
+
+To format `2+2=5`, we can do:
+
+```
+.EQ
+2+2=5
+.EN
+```
+
+The equation shorthands are predictable:
+
+| Symbol     | Macro   |
+|:----------:|:--------|
+| Greater than or equal to | >= |
+| Not equal  | !=      |
+| Superscript | sup {thing} |
+
+- [List of symbols](https://www.math-linux.com/man/man7/groff_char.7.html)
+
+### Examples
+
+The fraction 2/5ths:
+
+```
+.EQ
+\[25]
+.EN
+```
+
+E=MC^2:
+
+```
+.EQ
+E = MC sup 2
+.EN
+```
+
+Praedicate logic:
+
+```
+.EQ
+\[fa] x Rx \[te] y Syx
+.EN
+```
+