Syntax highlighting is temporarily broken after a nullable block parameter

[JosephPecoraro]

Syntax highlighting is temporarily broken after a nullable block parameter:

@interface B
- (void)method:(nullable void (^)(NSString *string))x;
- (BOOL)brokenHighlight;
- (BOOL)correctHighlight;
@end

GitHub appears to also have this issue!

[sorbits]

This sounds like a duplicate of #13!?!

[JosephPecoraro]

#13 is just about highlighting the keywords themselves.
#14 is about handing the keywords correctly in the grammar to avoid broken highlighting of other code.

I got the sense that they would be two quite different code changes, but you could treat them the same if you think they are.