review: fix some typos

Author: inbelic

clang/include/clang/Basic/DiagnosticLexKinds.td

@@ -1022,7 +1022,7 @@ Error<"expected 'begin' or 'end'">;
 let CategoryName = "Root Signature Lexical Issue" in {
   def err_hlsl_expected_number_literal: Error<"expected numberic literal">;
   def err_hlsl_number_literal_overflow :
-    Error<"integer literal is too large to be represented in any %select{signed |}0 integer type">;
+    Error<"integer literal '%0' is too large to be represented in a 32-bit integer type">;
   def err_hlsl_invalid_token: Error<"unable to lex a valid Root Signature token">;
   def err_hlsl_invalid_register_literal: Error<"expected unsigned integer literal as part of register">;
   def err_hlsl_rootsig_unexpected_eos : Error<"unexpected end to token stream">;

clang/unittests/Parse/ParseHLSLRootSignatureTest.cpp

@@ -220,8 +220,7 @@ TEST_F(ParseHLSLRootSignatureTest, ValidLexAllTokensTest) {
 }
 
 TEST_F(ParseHLSLRootSignatureTest, ValidLexPeekTest) {
-  // This test will check that we can lex all defined tokens as defined in
-  // HLSLRootSignatureTokenKinds.def, plus some additional integer variations
+  // This test will check that we the peek api is correctly used
   const llvm::StringLiteral Source = R"cc(
     )1
   )cc";