[css-scroll-snap-1] Fix indentation

Author: fantasai

css-scroll-snap-1/Overview.bs

@@ -490,13 +490,13 @@ Scroll Snapport: the 'scroll-padding' property {#scroll-padding}
         : <dfn><<length-percentage>></dfn>
         ::
             Defines an inward offset from the corresponding edge of the [=scrollport=].
-	    When the scrollport is the root scroller, the offset is relative to the layout viewport.
-	    
-	    <div class="note">
-	    	Though the [=scrollport=] is defined as the visual viewport of the scroll container,
-		scroll padding offsets are relative to the layout viewport when the scroll container is
-		the root scroller.
-	    </div>
+            When the scrollport is the root scroller, the offset is relative to the layout viewport.
+
+            <div class="note">
+                Though the [=scrollport=] is defined as the visual viewport of the scroll container,
+                scroll padding offsets are relative to the layout viewport when the scroll container is
+                the root scroller.
+            </div>
         : <dfn>auto</dfn>
         ::
             Indicates that the offset for the corresponding edge of the [=scrollport=] is UA-determined.