clang-format: [JS] support non-null assertions after all identifiers.

[mprobst]

Summary

Previously:

x = namespace !;

Now:

x = namespace!;

cfe/trunk/lib/Format/TokenAnnotator.cpp

private:
   void determineTokenType(FormatToken &Current) {
     if (!Current.is(TT_Unknown))
       // The token type is already known.
       return;
 
     if (Style.Language == FormatStyle::LK_JavaScript) {
       if (Current.is(tok::exclaim)) {
         if (Current.Previous &&
-            (Current.Previous->isOneOf(tok::identifier, tok::r_paren,
+            (Current.Previous->Tok.getIdentifierInfo() ||
+             Current.Previous->isOneOf(tok::identifier, tok::r_paren,
                                        tok::r_square, tok::r_brace) ||
              Current.Previous->Tok.isLiteral())) {
           Current.Type = TT_JsNonNullAssertion;
           return;
         }
         if (Current.Next &&
             Current.Next->isOneOf(TT_BinaryOperator, Keywords.kw_as)) {
           Current.Type = TT_JsNonNullAssertion;

cfe/trunk/unittests/Format/FormatTestJS.cpp

TEST_F(FormatTestJS, NonNullAssertionOperator) {
   verifyFormat("let x = foo! - 1;\n");
   verifyFormat("let x = {foo: 1}!;\n");
   verifyFormat(
       "let x = hello.foo()!\n"
       "            .foo()!\n"
       "            .foo()!\n"
       "            .foo()!;\n",
       getGoogleJSStyleWithColumns(20));
+  verifyFormat("let x = namespace!;\n");
 }
 
 TEST_F(FormatTestJS, Conditional) {
   verifyFormat("y = x ? 1 : 2;");
   verifyFormat("x ? 1 : 2;");
   verifyFormat("class Foo {\n"
                "  field = true ? 1 : 2;\n"
                "  method(a = true ? 1 : 2) {}\n"