[css-nav-1] Fix indentation error

Author: Jihye Hong

css-nav-1/Overview.bs

@@ -1014,6 +1014,7 @@ The processing model for spatial navigation describes how spatial navigation wor
 </figure>
 
 <div algorithm="to run the spatial navigation steps">
+
 To run the <dfn>spatial navigation steps</dfn> in <var>direction</var>, do the following:
 
 1. Let <var>searchOrigin</var> be the result of <a>setting the search origin</a>.
@@ -1086,6 +1087,7 @@ To run the <dfn>spatial navigation steps</dfn> in <var>direction</var>, do the f
     within <var>candidates</var> in <var>direction</var> starting from <var>eventTarget</var>.
 9. <a>Dispatches navbeforefocus event</a> at <var>eventTarget</var> with <var>direction</var> and <var>bestCandidate</var>.
 10. Run the <a>focusing steps</a> for <var>bestCandidate</var> and return.
+
 </div>
 
 <h3 id=heuristics>