From ac8909fa29ad8507ef99dcca38a22eea91422426 Mon Sep 17 00:00:00 2001
From: Adam Nelson <nelsonag@umich.edu>
Date: Tue, 8 Nov 2016 20:15:19 -0500
Subject: [PATCH] minor comment change

---
 openmc/data/function.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/openmc/data/function.py b/openmc/data/function.py
index b1cdb09de0..c8fa15b768 100644
--- a/openmc/data/function.py
+++ b/openmc/data/function.py
@@ -410,7 +410,9 @@ class Combination(EqualityMixin):
         Functions which are to be added together
     operations : Iterable of numpy.ufunc
         Operations to perform between functions; note that the standard order
-        of operations (i.e., PEMDAS) will not be followed.
+        of operations will not be followed, but can be simulated by
+        combinations of Combination objects. The operations parameter must have
+        a length one less than the number of functions.
 
 
     Attributes