[css-syntax-3][editorial] Update the railroad diagrams.

Author: tabatkins

css-syntax-3/Overview.bs

@@ -737,6 +737,34 @@ Token Railroad Diagrams</h3>
 			<pre class='railroad'>
 			T: -->
 			</pre>
+
+		<dt id="unicode-range-token-diagram"><<unicode-range-token>>
+		<dd>
+			<pre class=railroad>
+			Choice:
+				T: U
+				T: u
+			T: +
+			Choice:
+				OneOrMore:
+					N: hex digit
+					C: 1-6 times
+				Seq:
+					ZeroOrMore:
+						N: hex digit
+						C: 1-5 times
+					OneOrMore:
+						T: ?
+						C: 1 to (6-digits) times
+				Seq:
+					OneOrMore:
+						N: hex digit
+						C: 1-6 times
+					T: -
+					OneOrMore:
+						N: hex digit
+						C: 1-6 times
+			</pre>
 	</dl>
 
 <!--
@@ -1802,8 +1830,6 @@ Parsing</h2>
 	into one or more of several CSS constructs
 	(depending on which parsing algorithm is invoked).
 
-	The items that can appear in the tree are:
-
 
 
 <!--
@@ -1842,16 +1868,6 @@ Parser Railroad Diagrams</h3>
 					N: At-rule
 			</pre>
 
-		<dt id="rule-list-diagram">Rule list
-		<dd>
-			<pre class='railroad'>
-			Star:
-				Choice: 1
-					N: <whitespace-token>
-					N: Qualified rule
-					N: At-rule
-			</pre>
-
 		<dt id="at-rule-diagram">At-rule
 		<dd>
 			<pre class='railroad'>
@@ -1871,21 +1887,21 @@ Parser Railroad Diagrams</h3>
 			N: {} block
 			</pre>
 
-		<dt id="declaration-list-diagram">Declaration list
+		<dt id="declaration-list-diagram">{} block
 		<dd>
 			<pre class='railroad'>
+			T: {
 			N: ws*
-			Choice:
-				Seq:
-					Opt:
+			Star:
+				Choice:
+					Seq:
 						N: Declaration
-					Opt:
-						Seq:
-							T: ;
-							N: Declaration list
-				Seq:
+						T: ;
 					N: At-rule
-					N: Declaration list
+					N: Qualified rule
+				N: ws*
+			N: ws*
+			T: }
 			</pre>
 
 		<dt id="declaration-diagram">Declaration
@@ -1914,38 +1930,30 @@ Parser Railroad Diagrams</h3>
 			<pre class='railroad'>
 			Choice:
 				N: Preserved token
-				N: {} block
-				N: () block
-				N: [] block
+				N: Simple block
 				N: Function block
 			</pre>
 
 
-		<dt id="{}-block-diagram">{} block
-		<dd>
-			<pre class='railroad'>
-			T: {
-			Star:
-				N: Component value
-			T: }
-			</pre>
-
-		<dt id="()-block-diagram">() block
-		<dd>
-			<pre class='railroad'>
-			T: (
-			Star:
-				N: Component value
-			T: )
-			</pre>
-
-		<dt id="[]-block-diagram">[] block
+		<dt id="simple-block-diagram">Simple block
 		<dd>
 			<pre class='railroad'>
-			T: [
-			Star:
-				N: Component value
-			T: ]
+			Choice:
+				Seq:
+					T: {
+					Star:
+						N: Component value
+					T: }
+				Seq:
+					T: (
+					Star:
+						N: Component value
+					T: )
+				Seq:
+					T: [
+					Star:
+						N: Component value
+					T: ]
 			</pre>
 
 		<dt id="function-block-diagram">Function block