[css-layout-api] Spell check.

Author: dbaron

css-layout-api/Overview.bs

@@ -182,7 +182,7 @@ Note: In a future level of the specification there may be a way to query the <a>
       of ranges inside a {{InlineLayoutChild}}.
 
 A {{BoxLayoutChild}} represents a single <a>box</a>. It does have an associated computed style which
-can be asscessed by {{BoxLayoutChild/styleMap}}. The {{BoxLayoutChild/styleMap}} will only contain
+can be accessed by {{BoxLayoutChild/styleMap}}. The {{BoxLayoutChild/styleMap}} will only contain
 properties which are listed in the <a>child input properties</a> array.
 
 A {{BoxLayoutChild}} could be generated by:
@@ -264,7 +264,7 @@ The author inside the current layout can position a resulting {{Fragment}} by se
 default to zero.
 
 <div class="example">
-The layout algorithm performs a block-like layout (positioning fragments sequentically in the block
+The layout algorithm performs a block-like layout (positioning fragments sequentially in the block
 direction), while centering its children in the inline direction.
 
 <pre class="lang-javascript">
@@ -733,7 +733,7 @@ Layout Invalidation {#layout-invalidation}
 ------------------------------------------
 
 A <a>document</a> has an associated <dfn>layout name to input properties map</dfn> and a <dfn>layout
-name to child input properties map</dfn>. Initialy these maps are empty and are populated when
+name to child input properties map</dfn>. Initially these maps are empty and are populated when
 {{registerLayout(name, layoutCtor)}} is called.
 
 Each <a>box</a> has an associated <dfn>layout valid flag</dfn>. It may be either
@@ -768,8 +768,8 @@ When a child non-<a>atomic inline</a> represented by a {{InlineLayoutChild}} is
 from the <a>box tree</a> or has its layout invalidated (from a computed style change, or if its text
 has changed). Set the <a>layout valid flag</a> on the current <a>box</a> to <a>layout-invalid</a>.
 
-Note: This only describes layout invalidatation as it relates to the CSS Layout API. All
-    <a>boxes</a> conceptually have a <a>layout valid flag</a> and these changes are propogated
+Note: This only describes layout invalidation as it relates to the CSS Layout API. All
+    <a>boxes</a> conceptually have a <a>layout valid flag</a> and these changes are propagated
     through the <a>box tree</a>.
 
 Layout Worklet {#layout-worklet}