fix a problem related to #246: comments were used as normal strings

jedi/evaluate.py

@@ -791,7 +791,8 @@ def filter_private_variable(scope, call_scope, var_name):
 def goto(stmt, call_path=None):
     if call_path is None:
         commands = stmt.get_commands()
-        assert len(commands) == 1
+        # Only the first command is important, the rest should basically not
+        # happen except in broken code (e.g. docstrings that aren't code).
         call = commands[0]
         if isinstance(call, (str, unicode)):
             call_path = [call]

jedi/parsing_representation.py

@@ -1114,7 +1114,7 @@ class Statement(Simple):
                     result = []
                     is_chain = False
             else:
-                if tok != '\n':
+                if tok != '\n' and token_type != tokenize.COMMENT:
                     result.append(tok)
         return result
 

test/completion/basic.py

@@ -220,3 +220,14 @@ class B(): pass
 A.__init__
 #? ['__init__']
 B.__init__
+
+
+# -----------------
+# comments
+# -----------------
+
+class A():
+    def __init__(self):
+        self.hello = {}  # comment shouldn't be a string
+#? dict()
+A().hello