Update tokenize.cpp

Author: chrchr-github

lib/tokenize.cpp

@@ -6920,7 +6920,7 @@ Token *Tokenizer::simplifyAddBracesToCommand(Token *tok)
             // before the "while"
             if (tokEnd) {
                 tokEnd=tokEnd->next();
-                if (!tokEnd || tokEnd->str()!="while") // no while
+                if (!Token::simpleMatch(tokEnd, "while (") || !Token::simpleMatch(tokEnd->linkAt(1), ") ;")) // no while
                     syntaxError(tok);
             }
         }