[css-syntax] Terminology: use "code point" instead of "character".

Author: SimonSapin

css-syntax/Diagrams.src.html

@@ -60,17 +60,17 @@ <h3>Parsing</h3>
 
 add('newline', Diagram(Choice(0, '\\n', '\\r\\n', '\\r', '\\f')));
 
-add('whitespace character', Diagram(Choice(
+add('whitespace', Diagram(Choice(
 	0, 'space', '\\t', NonTerminal('newline'))));
 
 add('escape', Diagram(
 	'\\', Choice(0,
 		NonTerminal('not newline or hex digit'),
 		Sequence(
 			OneOrMore(NonTerminal('hex digit'), Comment('1-6 times')),
-			Optional(NonTerminal('whitespace character'), 'skip')))));
+			Optional(NonTerminal('whitespace'), 'skip')))));
 
-add('〈whitespace〉', Diagram(OneOrMore(NonTerminal('whitespace character'))));
+add('〈whitespace〉', Diagram(OneOrMore(NonTerminal('whitespace'))));
 
 add('〈ident〉', Diagram(
 	Choice(0, Skip(), '-'),