add unary -

Author: vchuravy

src/mapreduce.jl

@@ -222,7 +222,7 @@ for f in (:.+, :.-, :.*, :./, :.%, :.<<, :.>>)
 end
 
 ### Should be deleted when broadcast is defined
-for f in (:abs, :abs2, :acos, :acosd, :acosh, :acot, :acotd, :acoth,
+for f in (:-, :abs, :abs2, :acos, :acosd, :acosh, :acot, :acotd, :acoth,
           :acsc, :acscd, :acsch, :angle, :asec, :asecd, :asech, :asin,
           :asind, :asinh, :atan, :atand, :atanh, :big, :cbrt, :ceil, :cis,
           :complex, :cos, :cosc, :cosd, :cosh, :cospi, :cot, :cotd, :coth,

test/darray.jl

@@ -629,7 +629,7 @@ check_leaks()
 @testset "test scalar math" begin
     a = drand(20, 20);
     b = convert(Array, a)
-    @testset "$f" for f in (:abs, :abs2, :acos, :acosd, :acot,
+    @testset "$f" for f in (:-, :abs, :abs2, :acos, :acosd, :acot,
               :acotd, :acsch, :angle, :asech, :asin,
               :asind, :asinh, :atan, :atand, :atanh,
               :big, :cbrt, :ceil, :cis, :complex, :conj,