[enh] better debug output \o/
[enh] start to handle generator comprehension
[mod] update progress
[enh] handle if in comprehension structure
[mod] dirty tric for cleaner debug diff
[fix] only diff grammar when assert failed
[mod] respect python grammar by using old_test
[fix] correctly check that it's the AssertionError which has been raised
[enh] handle several ifs
[mod] change AST structure for generator comprehension
[enh] yay, handle 2 generator deep
[enh] another test for safety
[mod] clean stuff
[enh] yay, start list comprehension
[enh] yay, do list comprehension \o/
[mod] respect more python grammar
[mod] update progress
[mod] move code arround
[mod] remove useless code
[enh] basic set comprehension