[css-values-4] more typos

Author: tabatkins

css-values-4/Overview.bs

@@ -1036,12 +1036,12 @@ Font-relative lengths: the ''em'', ''ex'', ''cap'', ''ch'', ''ic'', ''rem'', ''l
 		<dt><dfn id="lh" lt="lh">lh unit</dfn>
 		<dd>
 			Equal to the computed value of the 'line-height' property of the element on which it is used,
-			converted to an absolute length by measuring the height line box containing only the strut (See [[CSS2/visudet#strut]]) would have.
+			converted to an absolute length by measuring the height of a line box containing only the strut (See [[CSS2/visudet#strut]]) would have.
 
 		<dt><dfn id="rlh" lt="rlh">rlh unit</dfn>
 		<dd>
 			Equal to the computed value of 'line-height' property on the root element,
-			converted to an absolute length by measuring the height line box containing only the strut (See [[CSS2/visudet#strut]]) would have.
+			converted to an absolute length by measuring the height of a line box containing only the strut (See [[CSS2/visudet#strut]]) would have.
 
 			Note: setting the 'height' of an element using either the ''lh'' or the ''rlh'' units
 			does not enable authors to control the actual number of lines in that element.
@@ -2256,7 +2256,7 @@ Toggling Between Values: ''toggle()''</h3>
 
 	If ''toggle()'' is used on a <a>shorthand property</a>,
 	it sets each of its longhands to a ''toggle()'' value
-	with arguments corresponding to what the longhand would have recieved
+	with arguments corresponding to what the longhand would have received
 	had each of the original ''toggle()'' arguments been the sole value of the <a>shorthand</a>.
 
 	<div class="example">