What are the rules for spacing with an oblique?
According to The Canadian Style, there is no space before or after an oblique (or slash) when used between individual words, letters or symbols:
However, you should leave one space before and after an oblique when used between longer groups of words that contain internal spacing:
It is important to ensure that spacing with an oblique is consistent throughout your text. For example, in a bilingual document, where English and French terms are separated by an oblique, put a space before and after the oblique throughout the text to avoid inconsistencies, such as surname/nom next to first name / prénom.