[css-syntax-3] Improvements to grammar, possessives, perspectives, and links (w3c#5340)

* Clarify simple block value description

* Align "Consume a function" description

* Fix reference from "the empty list" to "an empty list"

* Consistently link "list" when referred to in "an empty list"

Author: tabatkins

css-syntax-3/Overview.bs

@@ -2405,7 +2405,7 @@ Consume an at-rule</h4>
 	<a>Consume the next input token</a>.
 	Create a new at-rule
 	with its name set to the value of the <a>current input token</a>,
-	its prelude initially set to an empty list,
+	its prelude initially set to an empty [=list=],
 	and its value initially set to nothing.
 
 	Repeatedly consume the <a>next input token</a>:
@@ -2445,7 +2445,7 @@ Consume a qualified rule</h4>
 	To <dfn>consume a qualified rule</dfn>:
 
 	Create a new qualified rule
-	with its prelude initially set to an empty list,
+	with its prelude initially set to an empty [=list=],
 	and its value initially set to nothing.
 
 	Repeatedly consume the <a>next input token</a>:
@@ -2529,7 +2529,7 @@ Consume a declaration</h4>
 	<a>Consume the next input token</a>.
 	Create a new declaration
 	with its name set to the value of the <a>current input token</a>
-	and its value initially set to the empty [=list=].
+	and its value initially set to an empty [=list=].
 
 	<ol>
 		<li>
@@ -2599,7 +2599,7 @@ Consume a simple block</h4>
 	(E.g. if it was called with <a href="#tokendef-open-square">&lt;[-token></a>, the <a>ending token</a> is <a href="#tokendef-close-square">&lt;]-token></a>.)
 
 	Create a <a>simple block</a> with its associated token set to the <a>current input token</a>
-	and with a value with is initially an empty list.
+	and with its value initially set to an empty [=list=].
 
 	Repeatedly consume the <a>next input token</a> and process it as follows:
 
@@ -2640,8 +2640,8 @@ Consume a function</h4>
 
 	To <dfn>consume a function</dfn>:
 
-	Create a function with a name equal to the value of the <a>current input token</a>,
-	and with a value which is initially an empty list.
+	Create a function with its name equal to the value of the <a>current input token</a>
+	and with its value initially set to an empty [=list=].
 
 	Repeatedly consume the <a>next input token</a> and process it as follows: