IRQ.txt: add a markup for its title

This simple document only needs a markup for its title to be
using the standard we're adopting for text documents.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/IRQ.txt b/Documentation/IRQ.txt
index 1011e71..4273806 100644 (file)
--- a/Documentation/IRQ.txt
+++ b/Documentation/IRQ.txt
@@ -1,4 +1,6 @@
+===============
 What is an IRQ?
+===============
 
 An IRQ is an interrupt request from a device.
 Currently they can come in over a pin, or over a packet.