[selectors-4][editorial] Partial revert of so-called “bikeshed fixes” in 3a0c959 to preserve readability and communication of intent for people who don't live in the Infra spec.

Author: fantasai

selectors-4/Overview.bs

@@ -1612,7 +1612,8 @@ Case-sensitivity</h3>
 
 	Alternately, the attribute selector may include the identifier <code>s</code>
 	before the closing bracket (<code>]</code>);
-	in this case the UA must match the value with "[=identical to=]" semantics
+	in this case the UA must match the value case-sensitively,
+	with “[=identical to=]” semantics [[INFRA]],
 	regardless of document language rules.
 
 	Like the rest of Selectors syntax,
@@ -1646,8 +1647,8 @@ Case-sensitivity</h3>
 			 a later level -->
 
 	Note: Some document models normalize case-insensitive attribute values at parse time
-	such that checking if a string is [=identical to=] another is impossible.
-	Correct matching via <code>s</code> flags is only possible
+	such that checking if a string is case-sensitive matching is impossible.
+	Case-sensitive matching via <code>s</code> flags is only possible
 	in systems that preserve the original case.
 
 <h3 id="attrnmsp">
@@ -1819,7 +1820,8 @@ Class selectors</h3>
 
 	When matching against a document which is in <a>quirks mode</a>,
 	class names must be matched [=ASCII case-insensitively=];
-	class selectors otherwise only match class names they are [=identical to=].
+	class selectors are otherwise case-sensitive,
+	only matching class names they are [=identical to=]. [[INFRA]]
 
 <h3 id="id-selectors">
 ID selectors</h3>
@@ -1876,7 +1878,8 @@ ID selectors</h3>
 
 	When matching against a document which is in <a>quirks mode</a>,
 	IDs must be matched [=ASCII case-insensitively=];
-	ID selectors otherwise only match IDs they are [=identical to=].
+	ID selectors are otherwise case-sensitive,
+	only matching IDs they are [=identical to=]. [[INFRA]]
 
 <h2 id="linguistic-pseudos">
 Linguistic Pseudo-classes</h2>