Final draft of state printing after merge

This patch adds __str__` and `__repr__` methods to InferenceContext and
alters the `__str__, `__repr__, and repr_tree() methods for NodeNG.
The `__str__` methods print out formatted information about the object's
fields; NodeNG's `__str__` method is not recursive.  InferenceContext's
__repr__` gives a compact representation of its fields.  I slightly
shortened NodeNG's `__repr__` method by removing a field that's usually
empty.  I rewrote repr_tree() to better format the information it
contains and to display *all* the fields for each AST node, with some
fields controlled by options to avoid spam.  I also fixed
https://bitbucket.org/logilab/astroid/issues/185/as_string-gives-wrong-result-for-keyword .

1 files changed, 4 insertions, 0 deletions

diff --git a/astroid/scoped_nodes.py b/astroid/scoped_nodes.py
index 2d8a50d1..acdd06a5 100644
--- a/astroid/scoped_nodes.py
+++ b/astroid/scoped_nodes.py
@@ -954,6 +954,10 @@ class FunctionDef(bases.Statement, Lambda):
         return True
 
 
+class AsyncFunctionDef(FunctionDef):
+    """Asynchronous function created with the `async` keyword."""
+
+
 def _rec_get_names(args, names=None):
     """return a list of all argument names"""
     if names is None: