Rephrase "How to Teach This"

Author: AA-Turner

peps/pep-0802.rst

@@ -160,9 +160,8 @@ The empty set uses a forwards slash to differentiate it from
 an empty dictionary.
 It uses this syntax because it looks like the mathematical symbol
 for the empty set (':math:`\emptyset`').
-It is also similar to the syntax for other sets,
-which use a comma to separate elements, e.g. ``{2, 3, 5}``.
-These facts can be used as a helpful mnemonic.
+This can be used as a helpful mnemonic when teaching beginners,
+especially those that have a maths or science background.
 
 
 Reference Implementation