[css-logical-1] Remove confusing wording about omitted values. #7057

Author: fantasai

css-logical-1/Overview.bs

@@ -397,10 +397,10 @@ Flow-Relative Box Model Properties</h2>
   the 'margin-inline-start' of an ''direction/ltr'' parent
   even though that happens to be the parent’s <em>left</em> margin.
 
-  [=Shorthand properties=] that encompass both logical and physical longhands
+  Unless otherwise specified,
+  [=shorthand properties=] that encompass both logical and physical longhands
   (such as the 'all' shorthand)
-  set omitted values first,
-  and otherwise set the physical values last.
+  set their physical longhands last.
   For example, ''all: inherit'' will set all of the 'margin' properties to ''inherit'',
   but since the physical longhands are set last,
   the child's margins will inherit from their physical counterparts in the parent.