parser: Update make_grammer_text.py

- Support auto-generated license header based on created time.
- Add missed case when adding test cases #22

Author: corona10

parser/make_grammar_test.py

@@ -10,6 +10,7 @@
 
 import sys
 import ast
+import datetime
 import subprocess
 
 inp = [
@@ -57,6 +58,7 @@
     ("[1,]", "eval"),
     ("[1,2]", "eval"),
     ("[1,2,]", "eval"),
+    ("[e for e in (1,2,3)]", "eval"),
 
     # tuple
     ("( a for a in ab )", "eval"),
@@ -375,6 +377,9 @@
     ("a, b = *a", "exec"),
     ("a = yield a", "exec"),
     ('''a.b = 1''', "exec"),
+    ("[e for e in [1, 2, 3]] = 3", "exec", SyntaxError),
+    ("{e for e in [1, 2, 3]} = 3", "exec", SyntaxError),
+    ("{e: e**2 for e in [1, 2, 3]} = 3", "exec", SyntaxError),
     ('''f() = 1''', "exec", SyntaxError),
     ('''lambda: x = 1''', "exec", SyntaxError),
     ('''(a + b) = 1''', "exec", SyntaxError),
@@ -493,21 +498,26 @@ def escape(x):
 def main():
     """Write grammar_data_test.go"""
     path = "grammar_data_test.go"
-    out = ["""// Test data generated by make_grammar_test.py - do not edit
+    year = datetime.datetime.now().year
+    out = ["""// Copyright {year} The go-python Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Test data generated by make_grammar_test.py - do not edit
 
 package parser
 
 import (
 "github.com/go-python/gpython/py"
 )
 
-var grammarTestData = []struct {
+var grammarTestData = []struct {{
 in   string
 mode string
 out  string
 exceptionType *py.Type
 errString string
-}{"""]
+}}{{""".format(year=year)]
     for x in inp:
         source, mode = x[:2]
         if len(x) > 2: