Docs: Escaping at signs in example

Bug: 20102980
Change-Id: I237e254b78b21a52e9c3a7003cdbd46e35976026
diff --git a/src/devices/tech/filesystem-config.jd b/src/devices/tech/filesystem-config.jd
index 46a2ffc..78017a1 100644
--- a/src/devices/tech/filesystem-config.jd
+++ b/src/devices/tech/filesystem-config.jd
@@ -81,7 +81,7 @@
 index 0000000..874195f
 --- /dev/null
 +++ b/android_filesystem_config.h
-@@ -0,0 +1,36 @@
+@@ -0,0 +1,36 @@
 +/*
 + * Copyright (C) 2015 The Android Open Source Project
 + *
@@ -125,7 +125,7 @@
 index 0c71d21..235c1a7 100644
 --- a/device.mk
 +++ b/device.mk
-@@ -18,7 +18,8 @@ PRODUCT_PACKAGES := \
+@@ -18,7 +18,8 @@ PRODUCT_PACKAGES := \
      libwpa_client \
      hostapd \
      wpa_supplicant \