rewrite __future__ embed tests to use PEP 401

tools/tests/embed/embed_flufl.py

@@ -0,0 +1,5 b''
+"""This tests that future compiler flags are passed to the embedded IPython."""
+from __future__ import barry_as_FLUFL
+from IPython import embed
+embed(banner1='', header='check 1 <> 2 == True')
+embed(banner1='', header='check 1 <> 2 cause SyntaxError', compile_flags=0)

tools/tests/embed/embed_no_flufl.py

@@ -1,6 +1,6 b''
 """This tests that future compiler flags are passed to the embedded IPython."""
 from IPython import embed
 import __future__
-embed(banner1='', header='check 1/2 == 0 in Python 2')
-embed(banner1='', header='check 1/2 == 0.5 in Python 2',
-      compile_flags=__future__.division.compiler_flag)
+embed(banner1='', header='check 1 <> 2 cause SyntaxError')
+embed(banner1='', header='check 1 <> 2 == True',
+      compile_flags=__future__.barry_as_FLUFL.compiler_flag)