bibliography justified or change ampersand

I am unable to edit the CSL file for a citation style so that the bibliography is aligned to be "justified" as opposed to left aligned.
I have read that it seems impossible and that it has to be done with Word or Libreoffice. but with APA it works. I would like to modify this style : Université de Sherbrooke - Faculté d'éducation (French - Canada) :
How can I do this ?

An other solution for me would be to change this ampersand of APA by "et".

Thank you in advance for your help.
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