Distribute : at his request, Travis Crimshaw removed from Author's list.

EmmanuelCharpentier · EmmanuelCharpentier · commit c28097a513f9 · 2017-05-12T16:57:18.000+02:00
diff --git a/src/sage/symbolic/expression.pyx b/src/sage/symbolic/expression.pyx
@@ -10435,7 +10435,7 @@ cdef class Expression(CommutativeRingElement):
 
         AUTHORS:
 
-        - Emmanuel Charpentier, Ralf Stephan, Travis Scrimshaw (05-2017)
+        - Emmanuel Charpentier, Ralf Stephan (05-2017)
         """
         from sage.functions.other import symbolic_sum as opsum, \
             symbolic_product as opprod
