Add mul! to test

JeffFessler · JeffFessler · commit f87cdcdfe9fa · 2020-07-30T06:41:02.000-04:00
diff --git a/test/left.jl b/test/left.jl
@@ -1,5 +1,5 @@
 using Test, LinearMaps
-#, LinearAlgebra
+using LinearAlgebra: mul!
 
 # y'*L is an exception to the left multiplication rule that makes a WrappedMap
 
