remove whitespace

Author: estebank

tests/ui/lexer/emoji-in-lifetime.rs

@@ -9,11 +9,6 @@ fn bad_lifetime_name<
     'a‌b // bare zero-width-joiners are accepted as XID_Continue
 >() {}
 
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 fn main() {
     'a🐛: { // pointed at on the error from line 5
         todo!();