Auto-completion Inorrect After Hitting Enter

Auto-completion is working correctly until hitting tab but when you **hit enter** to choose suggestions, the returning string is incorrect.

**_Example:_**
`df.sh`

Expected value should be `df.shape `but it returned df.sape

Similar with other methods like `pd.read_pickle`, which returns pd.rpickle

Reproduce the autocomplete behavior with `df.sh` and `pd.read_pickle`, comparing the returned text with the expected completion. Trace the autocomplete entry point responsible for handling Enter, then verify that method names are returned intact for these examples.

Written by the indexing model from the issue text.