Better grammar coverage; reduce 3.x mklambda rules

test/simple_source/stmts/00_import.py

@@ -1,6 +1,9 @@
-# Tests:
+# Tests all the different kinds of imports
 import sys
 from os import path
 from os import *
 import time as time1, os as os1
 import http.client as httpclient
+if len(__file__) == 0:
+    # a.b.c should force consecutive LOAD_ATTRs
+    import a.b.c as d