Fix docs and comments for max_tokens_total pragma

clang/include/clang/Basic/DiagnosticGroups.td

@@ -1178,7 +1178,7 @@ the token limit, which can be set in three ways:
    which works like and overrides the ``-fmax-tokens=`` flag:
 
    .. code-block: c++
-      #pragma clang max_file_tokens 1234
+      #pragma clang max_tokens_total 1234
 
 These limits can be helpful in limiting code growth through included files.
 

clang/lib/Parse/ParsePragma.cpp

@@ -3336,7 +3336,7 @@ void PragmaMaxTokensHereHandler::HandlePragma(Preprocessor &PP,
   }
 }
 
-// Handle '#pragma clang max_file_tokens 12345'.
+// Handle '#pragma clang max_tokens_total 12345'.
 void PragmaMaxTokensTotalHandler::HandlePragma(Preprocessor &PP,
                                                PragmaIntroducer Introducer,
                                                Token &Tok) {