DOC correct indentation error in doc/users/config.rst

Author: Mathieu Dubois

doc/users/config_file.rst

@@ -115,10 +115,10 @@ Execution
     done after a job finish is detected. (float in seconds; default value: 5)
 
 *remove_node_directories (EXPERIMENTAL)*
-	Removes directories whose outputs have already been used
-	up. Doesn't work with IdentiInterface or any node that patches
-	data through (without copying) (possible values: ``true`` and
-	``false``; default value: ``false``)
+    Removes directories whose outputs have already been used
+    up. Doesn't work with IdentiInterface or any node that patches
+    data through (without copying) (possible values: ``true`` and
+    ``false``; default value: ``false``)
 
 *stop_on_unknown_version*
     If this is set to True, an underlying interface will raise an error, when no