spaCy/lang_data/en/infix.txt

\.\.\.
(?<=[a-z])\.(?=[A-Z])
(?<=[a-zA-Z])-(?=[a-zA-z])
(?<=[a-zA-Z])--(?=[a-zA-z])
(?<=[0-9])-(?=[0-9])
(?<=[A-Za-z]),(?=[A-Za-z])