Patch #1759: Backport of PEP 3129 class decorators

with some help from Georg

Include/graminit.h

@@ -3,82 +3,83 @@
 #define eval_input 258
 #define decorator 259
 #define decorators 260
-#define funcdef 261
-#define parameters 262
-#define varargslist 263
-#define fpdef 264
-#define fplist 265
-#define stmt 266
-#define simple_stmt 267
-#define small_stmt 268
-#define expr_stmt 269
-#define augassign 270
-#define print_stmt 271
-#define del_stmt 272
-#define pass_stmt 273
-#define flow_stmt 274
-#define break_stmt 275
-#define continue_stmt 276
-#define return_stmt 277
-#define yield_stmt 278
-#define raise_stmt 279
-#define import_stmt 280
-#define import_name 281
-#define import_from 282
-#define import_as_name 283
-#define dotted_as_name 284
-#define import_as_names 285
-#define dotted_as_names 286
-#define dotted_name 287
-#define global_stmt 288
-#define exec_stmt 289
-#define assert_stmt 290
-#define compound_stmt 291
-#define if_stmt 292
-#define while_stmt 293
-#define for_stmt 294
-#define try_stmt 295
-#define with_stmt 296
-#define with_var 297
-#define except_clause 298
-#define suite 299
-#define testlist_safe 300
-#define old_test 301
-#define old_lambdef 302
-#define test 303
-#define or_test 304
-#define and_test 305
-#define not_test 306
-#define comparison 307
-#define comp_op 308
-#define expr 309
-#define xor_expr 310
-#define and_expr 311
-#define shift_expr 312
-#define arith_expr 313
-#define term 314
-#define factor 315
-#define power 316
-#define atom 317
-#define listmaker 318
-#define testlist_gexp 319
-#define lambdef 320
-#define trailer 321
-#define subscriptlist 322
-#define subscript 323
-#define sliceop 324
-#define exprlist 325
-#define testlist 326
-#define dictmaker 327
-#define classdef 328
-#define arglist 329
-#define argument 330
-#define list_iter 331
-#define list_for 332
-#define list_if 333
-#define gen_iter 334
-#define gen_for 335
-#define gen_if 336
-#define testlist1 337
-#define encoding_decl 338
-#define yield_expr 339
+#define decorated 261
+#define funcdef 262
+#define parameters 263
+#define varargslist 264
+#define fpdef 265
+#define fplist 266
+#define stmt 267
+#define simple_stmt 268
+#define small_stmt 269
+#define expr_stmt 270
+#define augassign 271
+#define print_stmt 272
+#define del_stmt 273
+#define pass_stmt 274
+#define flow_stmt 275
+#define break_stmt 276
+#define continue_stmt 277
+#define return_stmt 278
+#define yield_stmt 279
+#define raise_stmt 280
+#define import_stmt 281
+#define import_name 282
+#define import_from 283
+#define import_as_name 284
+#define dotted_as_name 285
+#define import_as_names 286
+#define dotted_as_names 287
+#define dotted_name 288
+#define global_stmt 289
+#define exec_stmt 290
+#define assert_stmt 291
+#define compound_stmt 292
+#define if_stmt 293
+#define while_stmt 294
+#define for_stmt 295
+#define try_stmt 296
+#define with_stmt 297
+#define with_var 298
+#define except_clause 299
+#define suite 300
+#define testlist_safe 301
+#define old_test 302
+#define old_lambdef 303
+#define test 304
+#define or_test 305
+#define and_test 306
+#define not_test 307
+#define comparison 308
+#define comp_op 309
+#define expr 310
+#define xor_expr 311
+#define and_expr 312
+#define shift_expr 313
+#define arith_expr 314
+#define term 315
+#define factor 316
+#define power 317
+#define atom 318
+#define listmaker 319
+#define testlist_gexp 320
+#define lambdef 321
+#define trailer 322
+#define subscriptlist 323
+#define subscript 324
+#define sliceop 325
+#define exprlist 326
+#define testlist 327
+#define dictmaker 328
+#define classdef 329
+#define arglist 330
+#define argument 331
+#define list_iter 332
+#define list_for 333
+#define list_if 334
+#define gen_iter 335
+#define gen_for 336
+#define gen_if 337
+#define testlist1 338
+#define encoding_decl 339
+#define yield_expr 340