[clang-format] Fix annotation of Java/JavaScript keyword extends

Uncovered in llvm#124891.

Author: owenca

clang/lib/Format/TokenAnnotator.cpp

@@ -2583,6 +2583,11 @@ class AnnotatingParser {
     if (Tok.isNot(tok::identifier) || !Tok.Previous)
       return false;
 
+    if ((Style.isJavaScript() || Style.Language == FormatStyle::LK_Java) &&
+        Tok.is(Keywords.kw_extends)) {
+      return false;
+    }
+
     if (const auto *NextNonComment = Tok.getNextNonComment();
         (!NextNonComment && !Line.InMacroBody) ||
         (NextNonComment &&

clang/unittests/Format/TokenAnnotatorTest.cpp

@@ -3458,6 +3458,7 @@ TEST_F(TokenAnnotatorTest, BraceKind) {
   Tokens = annotate("a = class Foo extends goog.a {};",
                     getGoogleStyle(FormatStyle::LK_JavaScript));
   ASSERT_EQ(Tokens.size(), 12u) << Tokens;
+  EXPECT_TOKEN(Tokens[4], tok::identifier, TT_Unknown); // Not TT_StartOfName
   EXPECT_TOKEN(Tokens[8], tok::l_brace, TT_ClassLBrace);
   EXPECT_BRACE_KIND(Tokens[8], BK_Block);
   EXPECT_TOKEN(Tokens[9], tok::r_brace, TT_ClassRBrace);