new test for import-from with/without parentheses

tests/run/importfrom.pyx

+__doc__ = u"""
+>>> from distutils import cmd, core, version
+>>> import1() == (cmd, core, version)
+True
+>>> import2() == (cmd, core, version)
+True
+>>> import3() == (cmd, core, version)
+True
+>>> import4() == (cmd, core, version)
+True
+"""
+
+def import1():
+    from distutils import (
+
+        cmd,
+
+core,                    version)
+    return cmd, core, version
+
+
+def import2():
+    from distutils import (cmd,
+
+core,
+
+
+                           version
+)
+    return cmd, core, version
+
+
+def import3():
+    from distutils import (cmd, core,version)
+    return cmd, core, version
+
+def import4():
+    from distutils import cmd, core, version
+    return cmd, core, version