Merge pull request #3089 from mrego/fix-typos

[css-contain] Fix typos

Author: frivoal

css-contain-1/Overview.bs

@@ -381,7 +381,7 @@ Style Containment</h3>
 	    and vice versa.
 
 	    Note: “Scoping to an element” is currently unused.
-	    It is defined as an exention point for future specifications to use.
+	    It is defined as an extension point for future specifications to use.
 
 	* If <dfn export for=property lt="scoped to a sub-tree | scoped to the sub-tree | scoped to the element's sub-tree | scoped to an element's sub-tree">scoped to a sub-tree</dfn>, it's the same,
 	    except the scoping element itself is counted as "outside" the tree,
@@ -540,7 +540,7 @@ This appendix is <em>informative</em>.
 <a href="https://www.w3.org/TR/2018/CR-css-contain-1-20180524/">Candidate Recommendation of 24 May 2018</a></h3>
 
 * Clarify that layout containment causes overflow to be treated as ink overflow only when visible (or clip)
-* Layout containment suppresses baseline alignement, but size containment does not
+* Layout containment suppresses baseline alignment, but size containment does not
 * Layout containment causes the element to establish a new stacking context
 * Size containment does not apply to tables
 * Clarify that the columns and grid properties affect the size of size-contained elements
@@ -554,7 +554,7 @@ This appendix is <em>informative</em>.
 	<li>Clarify to which box paint containment clips (<a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/5b92ee3c170e3be239937a3ae069f37655ff6671">see tests</a>).
 	<li>Move the interaction between containment and the <code>bookmark-*</code> and <code>string-set</code> properties to  [[CSS-CONTENT-3]] (additional tests not needed, no change in behavior).
 	<li>Remove the effects of style containment on the "break-*" properties (<a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/d6a4f606a0501fe6ca526483a7a379ba2e9eaa1c">see tests</a>).
-	<li>Move the description of the effects of containement on regions from this specification to [[CSS-REGIONS-1]] (additional tests not needed, no change in behavior).
+	<li>Move the description of the effects of containment on regions from this specification to [[CSS-REGIONS-1]] (additional tests not needed, no change in behavior).
 	<li>Clarify the effects of style scoping on counter-set and counter-increment (<a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/d7fbc4794403dfeb55f13310d4c1cb51813e2d6e">see tests</a>)
 	<li>Size layout and paint containment don't apply to internal ruby elements (<a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/ba5a04e3d65f9f39c2d6431a9ece5eb15d22116b">see tests</a>)
 	<li>Layout, Paint, and size containments do not apply to non-atomic inlines (see <a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/402a19bde8981a402d9dba73083f84d96e4aeeb9">tests here</a> and <a href="https://github.com/web-platform-tests/wpt/pull/10549/commits/69b5681ee7aa5a028eb694b2c93bfd48c1ef08e4">one more test here</a>)