qualified method names in tests

Author: Ben J. Ward

test/runtests.jl

@@ -60,9 +60,9 @@ end
 end
 
 @testset "masking bits" begin
-    @test mask(UInt64, 12) == 0x0000000000000fff
-    @test mask(13) == 0x0000000000001fff
-    @test mask(UInt16, 9) == 0x01ff
+    @test Twiddle.mask(UInt64, 12) == 0x0000000000000fff
+    @test Twiddle.mask(13) == 0x0000000000001fff
+    @test Twiddle.mask(UInt16, 9) == 0x01ff
 end
 
 end