[clang-format][NFC] Improve an if conditional in the annotator

Author: owenca

clang/lib/Format/TokenAnnotator.cpp

@@ -2391,9 +2391,8 @@ class AnnotatingParser {
       return true;
 
     // If a (non-string) literal follows, this is likely a cast.
-    if (Tok.Next->isNot(tok::string_literal) &&
-        (Tok.Next->Tok.isLiteral() ||
-         Tok.Next->isOneOf(tok::kw_sizeof, tok::kw_alignof))) {
+    if (Tok.Next->isOneOf(tok::kw_sizeof, tok::kw_alignof) ||
+        (Tok.Next->Tok.isLiteral() && Tok.Next->isNot(tok::string_literal))) {
       return true;
     }