[css-transforms-2] Fix typos

Author: fantasai

css-transforms-2/Overview.bs

@@ -171,7 +171,7 @@ Authors can easily provide a fallback if UAs do not provide support for three-di
 The Transform Rendering Model {#transform-rendering}
 ====================================================
 
-This specification extends [[css-transforms-1#transform-rendering]] to account for the existence of three-dimensional transform functions, the Z value of 'transform-orign', the 'perspective' property, and a new 3D rendering model that applies when the used value of the ''transform-style'' property is ''preserve-3d''.
+This specification extends [[css-transforms-1#transform-rendering]] to account for the existence of three-dimensional transform functions, the Z value of 'transform-origin', the 'perspective' property, and a new 3D rendering model that applies when the used value of the ''transform-style'' property is ''preserve-3d''.
 
 Three-dimensional transform functions conceptually extend the coordinate space into three dimensions, adding a Z axis perpendicular to the plane of the screen, that increases towards the viewer.
 
@@ -411,7 +411,7 @@ This example shows how nested 3D transforms are rendered. The blue div is transf
 
 ### Transformed element hierarchies ### {#transformed-element-hierarchies}
 
-By default, <a>transformed elements</a> do not create a <a>3D rendering context</a> and create a flattened representation of their content. However, since it is useful to construct hierarchies of transformed objects that share a common 3-dimensional space, this flattening behavior may be overridden by specifying a value of ''preserve-3d'' for the ''transform-style'' property. This allows descendants of the transformed element to share the same 3D rendering context. Non-3D-transformed descendants of such elements are rendered into the plane of the element in step C above, but 3D-transformed elements in the same 3D rendering context will "pop out" into their own planes.
+By default, <a>transformed elements</a> do not create a <a>3D rendering context</a> and create a flattened representation of their content. However, since it is useful to construct hierarchies of transformed objects that share a common 3-dimensional space, this flattening behavior may be overridden by specifying a value of ''preserve-3d'' for the 'transform-style' property. This allows descendants of the transformed element to share the same 3D rendering context. Non-3D-transformed descendants of such elements are rendered into the plane of the element in step C above, but 3D-transformed elements in the same 3D rendering context will "pop out" into their own planes.
 
 <div class="example">
 	<pre>