Fix linkage, and add bare minimum semantic line-breaks

Author: Anders Hartvoll Ruud

web-animations-1/Overview.bs

@@ -3311,7 +3311,8 @@ result.
   this algorithm.
 
 This algorithm implies that property values specified in keyframes can
-establish order dependencies. When <a>computing a property value</a>, the
+establish order dependencies.
+When [=compute a property value|computing a property value=], the
 <a>computed values</a> of dependencies held by <var>value</var> must be
 calculated <em>first</em>.
 
@@ -3327,8 +3328,8 @@ In this example, in order to <a>compute a property value</a> for
 <code>10em</code>, we must know the <a>computed value</a> of
 'font-size' on the <a>target element</a>, which in turn is determined
 by the <a>effect value</a> for 'font-size', which in turn requires that we
-compute property values for 'font-size'. Hence, computing property
-values are subject to ordering constraints.
+compute property values for 'font-size'.
+Hence, computing property values are subject to ordering constraints.
 </div>
 
 </div>
@@ -3606,8 +3607,9 @@ Note: this procedure permits overlapping <a>keyframes</a>.
     <a>keyframe</a> in <var>keyframes</var> respectively.
 
 <div class="note">
-    Note that <a>computed keyframes</a> are "live": user-agents must behave
-    as if they are recreated every time the <a>effect value</a> is calculated.
+    Note that <a>computed keyframes</a> are "live":
+    user-agents must behave as if they are recreated every time the
+    <a>effect value</a> is calculated.
 
     For example, if there is an ongoing transition on the 'font-size' property
     from <code>10px</code> to <code>20px</code>, a property value specified as