[css-snap-size] Minor changes

Author: kojiishi

css-snap-size/Overview.bs

@@ -28,7 +28,7 @@ Snapping Heights: the 'snap-height' property {#snap-height}
 
 <pre class='propdef'>
   Name: snap-height
-  Value: none | <<length>> <<number>>?
+  Value: none | <<length>> <<integer>>?
   Initial: none
   Applies to: block, flex and grid containers
   Inherited: yes
@@ -47,24 +47,24 @@ Values have the following meanings:
   <dt><<length>>
   <dd>
     This value defines the <dfn>grid unit</dfn>.
-  <dt><<number>>
+    Positive values are valid.
+  <dt><<integer>>
   <dd>
     This value defines the <dfn>grid baseline position</dfn>
     within the <a>grid unit</a>.
+    Values between 1 and 100 (inclusive) are valid.
 </dl>
 
-When the <a>grid unit</a> is set to a positive length,
+When the <a>grid unit</a> is set,
 the line box heights are rounded <i>up</i> to
 the closest multiple of the unit.
 
-[[!CSS21]] defines how to compute the line box height
+[[!CSS21]] 10.8 Line height calculations
+defines how to compute the line box height
 after the line box was constructed from inline-level boxes.
 The rounding is applied to the computed line box height.
 The additional spaces created by the rounding
 are added <a>over</a> and <a>under</a> the line box.
-These spaces do not affect the top and the bottom of the line box,
-so that the position of ''vertical-align/top'' or ''vertical-align/bottom''
-of the 'vertical-align' property relative to the line box are not affected.
 
 The <a>grid baseline position</a> then determines
 how the additional spaces are distributed to <a>over</a> and <a>under</a>.
@@ -129,7 +129,7 @@ the additional spaces are distributed using the following formula:
 * space-over = GU - mod(T + GU - BP, GU)
 * space-under = GU - mod(space-over + T + B, GU)
 * GU: the <a>grid unit</a>.
-* BP: the <a>grid baseline position</a> &times; GU.
+* BP: the <a>grid baseline position</a> &times; GU / 100.
 * T: the distance between the top of the line box and the baseline.
 * B: the distance between the bottom of the line box and the baseline.