Fix places where I was short one colon.

Author: dbaron

css3-overflow/Overview.html

@@ -293,10 +293,10 @@ <h2 id=region-overflow><span class=secno>3. </span>Region overflow</h2>
    columns or pages; the pieces that are in separate columns or pages are
    always distinct region boxes.)
 
-  <p class=issue> We also want ‘<code class=css>:nth-region()</code>’
+  <p class=issue> We also want ‘<code class=css>::nth-region()</code>’
    pseudo-elements to be able to apply to the pieces of an element split
    within a fragmentation context. Should we require that authors who want to
-   use ‘<code class=css>:nth-region()</code>’ in this way specify
+   use ‘<code class=css>::nth-region()</code>’ in this way specify
    ‘<code class=css>overflow:regions</code>’ (even if they don't specify
    a constrained height), or should it work automatically for all elements
    even if they don't have ‘<code class=css>overflow: regions</code>’?
@@ -394,7 +394,7 @@ <h4 id=style-of-regions><span class=secno>3.1.2. </span>Styling of regions</h4>
    (excluding the ‘<code class=css>::nth-region()</code>’ pseudo-element)
    matches the element generating the regions.
 
-  <p> Styling an ‘<code class=css>:nth-region()</code>’ pseudo-element
+  <p> Styling an ‘<code class=css>::nth-region()</code>’ pseudo-element
    with the ‘<code class=property>overflow</code>’ property has no
    effect; the computed value of ‘<code class=property>overflow</code>’
    for the region box remains the same as the computed value of overflow for
@@ -403,7 +403,7 @@ <h4 id=style-of-regions><span class=secno>3.1.2. </span>Styling of regions</h4>
   <p> Specifying ‘<code class=css>display: none</code>’ for a region box
    causes the region box with that index not to be generated. However, in
    terms of the indices used for matching ‘<code
-   class=css>:nth-region()</code>’ pseudo-elements of later region boxes,
+   class=css>::nth-region()</code>’ pseudo-elements of later region boxes,
    it still counts as though it was generated. However, since it is not
    generated, it does not contain any content.
 
@@ -443,11 +443,11 @@ <h4 id=style-in-regions><span class=secno>3.1.3. </span>Styling inside
   <p class=issue> Should this apply to region overflow only, or also to
    paginated overflow, or even to pagination across pages?
 
-  <p> The ‘<code class=css>:nth-region()</code>’ pseudo-element can also
+  <p> The ‘<code class=css>::nth-region()</code>’ pseudo-element can also
    be used to style content inside of a <a href="#region-box"><i>region
    box</i></a>. Unlike the ‘<code class=css>::first-line</code>’ and
    ‘<code class=css>::first-letter</code>’ pseudo-elements, the ‘<code
-   class=css>:nth-region()</code>’ pseudo-element can be applied to parts
+   class=css>::nth-region()</code>’ pseudo-element can be applied to parts
    of the selector other than the subject: in particular, it can match
    ancestors of the subject. However, the only CSS properties applied by
    rules with such selectors are those that apply to the ‘<code

css3-overflow/Overview.src.html

@@ -198,11 +198,11 @@ <h2 id="region-overflow">Region overflow</h2>
 	</p>
 
 	<p class="issue">
-		We also want '':nth-region()'' pseudo-elements
+		We also want ''::nth-region()'' pseudo-elements
 		to be able to apply to the pieces of an element
 		split within a fragmentation context.
 		Should we require that authors who want to use
-		'':nth-region()'' in this way specify ''overflow:regions''
+		''::nth-region()'' in this way specify ''overflow:regions''
 		(even if they don't specify a constrained height),
 		or should it work automatically for all elements
 		even if they don't have ''overflow: regions''?
@@ -299,7 +299,7 @@ <h4 id="style-of-regions">Styling of regions</h4>
 	</p>
 
 	<p>
-		Styling an '':nth-region()'' pseudo-element with the 'overflow'
+		Styling an ''::nth-region()'' pseudo-element with the 'overflow'
 		property has no effect;
 		the computed value of 'overflow' for the region box
 		remains the same as the computed value of overflow for the element.
@@ -309,7 +309,7 @@ <h4 id="style-of-regions">Styling of regions</h4>
 		Specifying ''display: none'' for a region box causes
 		the region box with that index not to be generated.
 		However, in terms of the indices
-		used for matching '':nth-region()'' pseudo-elements
+		used for matching ''::nth-region()'' pseudo-elements
 		of later region boxes,
 		it still counts as though it was generated.
 		However, since it is not generated, it does not contain any content.
@@ -360,11 +360,11 @@ <h4 id="style-in-regions">Styling inside regions</h4>
 	</p>
 
 	<p>
-		The '':nth-region()'' pseudo-element
+		The ''::nth-region()'' pseudo-element
 		can also be used to style
 		content inside of a <i>region box</i>.
 		Unlike the ''::first-line'' and ''::first-letter'' pseudo-elements,
-		the '':nth-region()'' pseudo-element can be applied
+		the ''::nth-region()'' pseudo-element can be applied
 		to parts of the selector other than the subject:
 		in particular, it can match ancestors of the subject.
 		However, the only CSS properties applied