add logic documentation for fuzzy_match

evals/elsuite/basic/fuzzy_match.py

@@ -7,6 +7,10 @@
 
 
 class FuzzyMatch(evals.Eval):
+    """
+    For a model completion `a` and a reference list of correct answers `B`, the following eval 
+    implements `any([(a in b or b in a) for b in B])`, as mentioned in `eval-templates.md`.
+    """
     def __init__(
         self,
         completion_fns: list[CompletionFn],