Fix Apache Directives [ci skip]

Directives need to be placed on their own lines in order to work. Tested on: `Server version: Apache/2.2.22 (Ubuntu); Server built:   Mar 19 2014 21:11:15`

guides/source/asset_pipeline.md

@@ -788,9 +788,11 @@ For Apache:
 # `mod_expires` to be enabled.
 <Location /assets/>
   # Use of ETag is discouraged when Last-Modified is present
-  Header unset ETag FileETag None
+  Header unset ETag 
+  FileETag None
   # RFC says only cache for 1 year
-  ExpiresActive On ExpiresDefault "access plus 1 year"
+  ExpiresActive On 
+  ExpiresDefault "access plus 1 year"
 </Location>
 ```