Autocomplete broke for long path

This is a question rather than a issue with the sofware. When I tab complete a path in IRkernel, the full path is shown in the suggestion box and the file names are truncated. Does anyone known how to configure the autocomplete to show the file name only or show the full path without truncating the end?

Reproduce the tab-completion behavior described in the issue using a long path in IRkernel and inspect the suggestion box shown in the attached screenshot. Determine whether configuration can show file names or prevent end truncation; done means documenting the supported configuration or correcting the autocomplete display.

Written by the indexing model from the issue text.