Clojure does not have Python's triple-quoted strings, that is true. Why? They have only come up a few times before in discussion on this Google group, and Rich Hickey has not participated in them that I have seen, so most likely he may simply not see much advantage to having them in the language, vs. possible backwards-compatibility issues that might arise if they were added.
One of the main uses of raw string literals in Python is to avoid having to use two consecutive backslashes to get on backslash in a string, which is most useful in regular expressions, where backslashes are quite common. Clojure has regex literals with the syntax #"\d+" which have that feature of Python raw string literals.