[selectors-4] Fix typo (#11246)

Author: OnlyWick

selectors-4/Overview.bs

@@ -850,7 +850,7 @@ Pseudo-classes</h3>
 		which allow additional content to be inserted before or after the contents of any element.
 	</div>
 
-	Like <a>pseudo-classes</a>
+	Like <a>pseudo-classes</a>,
 	<a>pseudo-elements</a> do not appear in or modify the document source or document tree.
 	Accordingly, they also do not affect the interpretation of <a>structural pseudo-classes</a>
 	or other selectors pertaining to their <a>originating element</a> or its tree.
@@ -1925,7 +1925,7 @@ ID selectors</h3>
 	In HTML all ID attributes are named <code>id</code>;
 	XML applications may name ID attributes differently,
 	but the same restriction applies.
-	Which attribute on an element is considered the “ID attribute“ is defined by the document language.
+	Which attribute on an element is considered the “ID attribute” is defined by the document language.
 
 	An <dfn export>ID selector</dfn> consists of a “number sign” (U+0023, <code>#</code>)
 	immediately followed by the ID value,
@@ -2243,7 +2243,7 @@ The Target Pseudo-class: '':target''</h3>
 The Target Container Pseudo-class: '':target-within''</h3>
 
 	The <dfn id='target-within-pseudo'>:target-within</dfn> pseudo-class
-	applies to any element to which the '':target'' pseudo class applies
+	applies to any element to which the '':target'' pseudo-class applies
 	as well as to any element whose descendant in the <a>flat tree</a>
 	(including non-element nodes, such as text nodes)
 	matches the conditions for matching '':target''.
@@ -2376,7 +2376,7 @@ The Input Focus Pseudo-class: '':focus''</h3>
 	For example, [[HTML]] defines a list of <a href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area">focusable areas</a>.
 
 	Document languages may define additional ways in which an element can match '':focus'',
-	except that the '':focus'' pseudo class must not automatically propagate to the parent element--
+	except that the '':focus'' pseudo-class must not automatically propagate to the parent element--
 	see '':focus-within'' if matching on the parent is desired.
 	('':focus'' may still apply to the parent element
 	if made to propagate due to other mechanisms,
@@ -2471,7 +2471,7 @@ The Focus Container Pseudo-class: '':focus-within''</h3>
 
 	The <dfn id='focus-within-pseudo'>:focus-within</dfn> pseudo-class
 	applies to any element (or pseudo-element)
-	for which the '':focus'' pseudo class applies,
+	for which the '':focus'' pseudo-class applies,
 	as well as to an element (or pseudo-element)
 	whose descendant in the <a>flat tree</a>
 	(including non-element nodes, such as text nodes)
@@ -3553,7 +3553,7 @@ Calculating a selector's specificity</h2>
 			in its <a>selector list</a> argument.
 		<li>
 			Analogously, the specificity of an '':nth-child()'' or '':nth-last-child()'' selector
-			is the specificity of the pseudo class itself (counting as one pseudo-class selector)
+			is the specificity of the pseudo-class itself (counting as one pseudo-class selector)
 			plus the specificity of
 			the most specific <a>complex selector</a>
 			in its <a>selector list</a> argument (if any).