fix(trash bin): Improve clarity of files retention config

Signed-off-by: Louis Chemineau <louis@chmn.me>

Author: artonge

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -1384,7 +1384,7 @@ Available values (D1 and D2 are configurable numbers):
     and automatically deletes anytime after that if space is needed (note:
     files may not be deleted if space is not needed).
 * ``D1, auto``
-    keeps files and folders in the trash bin for D1+ days, delete anytime if
+    keeps files and folders in the trash bin for D1+ days, then delete files if
     space needed (note: files may not be deleted if space is not needed)
 * ``auto, D2``
     delete all files in the trash bin that are older than D2 days
@@ -2552,16 +2552,16 @@ memcached_options
 		\Memcached::OPT_SEND_TIMEOUT =>    50,
 		\Memcached::OPT_RECV_TIMEOUT =>    50,
 		\Memcached::OPT_POLL_TIMEOUT =>    50,
-	
+
 		// Enable compression
 		\Memcached::OPT_COMPRESSION =>          true,
-	
+
 		// Turn on consistent hashing
 		\Memcached::OPT_LIBKETAMA_COMPATIBLE => true,
-	
+
 		// Enable Binary Protocol
 		\Memcached::OPT_BINARY_PROTOCOL =>      true,
-	
+
 		// Binary serializer vill be enabled if the igbinary PECL module is available
 		//\Memcached::OPT_SERIALIZER => \Memcached::SERIALIZER_IGBINARY,
 	],