Added in support for autocompleting enumerate.

Resolves #554

test/completion/stdlib.py

@@ -35,6 +35,15 @@ next(open(''))
 #? ['__itemsize__']
 tuple.__itemsize__
 
+# -----------------
+# enumerate
+# -----------------
+for i, j in enumerate(["as", "ad"]):
+    #? int()
+    i
+    #? str()
+    j
+
 # -----------------
 # re
 # -----------------