Slash is not completed after directory name when full name specified

File auto-completer is not completing slash symbol when full name of directory is specified.

Directory sturcture:

<WORKING_DIRECTORY>/test/child

This scenario are not working:

test<TAB>

this should add slash after test and be:

test/

test/child<TAB>
this should also result to:

test/child/

When the directory is specified partially, it's correct:

tes<TAB>

result:

test/