Wrote unit test for RequestCleanTextFromFile -- desktop-clock-info.

Note: The console-waterworks unit test from previous commit seems to be passing. I haven't touched it since the last commit so... odd... very odd.

TestCentre/UnitTests.fs

@@ -160,6 +160,15 @@
                 |> Async.RunSynchronously
                 |> countSentences
             Assert.Equal(desiredSentencesCount, result)
+
+        [<Fact>]
+        let ``RequestCleanTextFromFile returns intended numbe of sentences when using desktop-clock-info`` () =
+            let desiredSentencesCount = (ValidSentencesInput())
+            let result =
+                Pancake.RequestCleanTextFromFileAsync (ValidGibberishLevelInput()) desiredSentencesCount DesktopClock
+                |> Async.RunSynchronously
+                |> countSentences
+            Assert.Equal(desiredSentencesCount, result)
         // YOU ARE HERE...
         // - ADD TESTS FOR "CLEANING" FUNCTIONS