[css-align] editorial nits

Author: tabatkins

css-align/Overview.bs

@@ -501,7 +501,7 @@ Content Distribution: the 'justify-content' and 'align-content' properties</h2>
 	Animatable: no
 	</pre>
 
-	Aligns the contents of the box as a whole along the box's inline/row/main axis.
+	Aligns the contents of the box as a whole.
 	Values other than <dfn value for="justify-content, align-content">normal</dfn> are defined in [[#alignment-values]], above.
 	If both a <<content-distribution>> and <<content-position>> are given,
 	the <<content-position>> provides an explicit <a>fallback alignment</a>.
@@ -937,7 +937,7 @@ Inline/Main-Axis Alignment: the 'justify-items' property</h3>
 
 	<pre class="propdef">
 	Name: justify-items
-	Value: auto | normal | stretch | <<baseline-position>> | [ <<self-position>> && <<overflow-position>>? ] | [ legacy && [ ''<content-position>/left'' | ''<content-position>/right'' | ''<content-position>/center'' ] ]
+	Value: auto | normal | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<self-position>> ] | [ legacy && [ ''<content-position>/left'' | ''<content-position>/right'' | ''<content-position>/center'' ] ]
 	Initial: auto
 	Applies to: block containers and grid containers
 	Inherited: no
@@ -989,7 +989,7 @@ Block/Cross-Axis Alignment: the 'align-items' property</h3>
 
 	<pre class="propdef">
 	Name: align-items
-	Value: normal | stretch | <<baseline-position>> | [ <<self-position>> && <<overflow-position>>? ]
+	Value: normal | stretch | <<baseline-position>> | [ <<overflow-position>>? && <<self-position>> ]
 	Initial: auto
 	Applies to: block-level elements
 	Inherited: no