From 2dfb837974e9c2a8e4f4103dc58d0a6983ddb310 Mon Sep 17 00:00:00 2001
From: Tomas Doran <tdoran@yelp.com>
Date: Fri, 3 Apr 2015 15:51:12 +0100
Subject: [PATCH] Document the fix to GH-1068 on the website

---
 website/source/docs/configuration/interpolation.html.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/website/source/docs/configuration/interpolation.html.md b/website/source/docs/configuration/interpolation.html.md
index 15f39ddf1..e51830a8d 100644
--- a/website/source/docs/configuration/interpolation.html.md
+++ b/website/source/docs/configuration/interpolation.html.md
@@ -16,6 +16,9 @@ into strings. These interpolations are wrapped in `${}`, such as
 The interpolation syntax is powerful and allows you to reference
 variables, attributes of resources, call functions, etc.
 
+You can also perform simple math in interpolations, allowing
+you to write expressions such as `${count.index+1}`.
+
 ## Available Variables
 
 **To reference user variables**, use the `var.` prefix followed by the