From 85c9b6bb442039c773120059ae35a31f8ef9d488 Mon Sep 17 00:00:00 2001
From: Matthew Brown <github@muglug.com>
Date: Fri, 9 Aug 2019 11:40:46 -0400
Subject: [PATCH] Add documentation for automatically removing UnusedVariable

---
 docs/manipulating_code/fixing.md | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/docs/manipulating_code/fixing.md b/docs/manipulating_code/fixing.md
index 4397a761e..2d1927eb7 100644
--- a/docs/manipulating_code/fixing.md
+++ b/docs/manipulating_code/fixing.md
@@ -426,3 +426,28 @@ class A {
 
 new A();
 ```
+
+### UnusedVariable
+
+This removes unused variables.
+
+Running `vendor/bin/psalter --issues=UnusedVariable` on
+
+```php
+function foo() : void {
+    $a = 5;
+    $b = 6;
+    $c = $d = $a + $b;
+    echo "foo";
+}
+```
+
+gives
+
+```php
+function foo() : void {
+    $a = 5;
+    $b = 6;
+    echo "foo";
+}
+```