[css-anchor-position-1][editorial] fix indentation

Author: tabatkins

css-anchor-position-1/Overview.bs

@@ -633,9 +633,9 @@ what area of this [=position-area grid=] to lay out the positioned box in.
 Values other than ''position-area/none'' have the following additional effects:
 
 * The [=scrollable containing block=] is used in place of the [=local containing block=]
-    where applicable,
-    so that the entire [=scrollable overflow area=] (typically) is available
-    for positioning.
+	where applicable,
+	so that the entire [=scrollable overflow area=] (typically) is available
+	for positioning.
 * Any ''top/auto'' [=inset properties=] resolve to ''0''.
 * The ''align-self/normal'' value for the [=self-alignment properties=]
 	resolves to a corresponding value, see [[#position-area-alignment]].