Fix a bug in call_of_name.

It was possible to get a NAME(x) result when calling call_of_name on x, which shouldn't happen. It should just return x.

test/test_evaluate/test_helpers.py

@@ -0,0 +1,16 @@
+from textwrap import dedent
+
+from jedi import names
+from jedi.evaluate import helpers
+
+
+def test_call_of_name_in_brackets():
+    s = dedent("""
+    x = 1
+    type(x)
+    """)
+    last_x = names(s, references=True, definitions=False)[-1]
+    name = last_x._name
+
+    call = helpers.call_of_name(name)
+    assert call == name