Fixed bug for 'narrow Python builds', this unichr was not supported.
Fixed bug for 'narrow Python builds', this unichr was not supported.

jonathanslenders/python-prompt-toolkit,jaseg/python-prompt-toolkit,melund/python-prompt-toolkit,Carreau/python-prompt-toolkit,niklasf/python-prompt-toolkit,ALSchwalm/python-prompt-toolkit,Carreau/python-prompt-toolkit,amjith/python-prompt-toolkit,ddalex/python-prompt-toolkit