at, batch: consistency between examples. (#2729)

pages/common/batch.md

@@ -3,6 +3,10 @@
 > Execute commands at a later time when the system load levels permit.
 > Service atd (or atrun) should be running for the actual executions.
 
+- Execute commands from standard input (press `Ctrl + D` when done):
+
+`batch`
+
 - Execute a command from standard input:
 
 `echo "{{./make_db_backup.sh}}" | batch`
@@ -10,7 +14,3 @@
 - Execute commands from a given file:
 
 `batch -f {{path/to/file}}`
-
-- Execute commands from standard input (press `Ctrl + D` when finished):
-
-`batch`