Updated RequestTestFile -- test-post.

Now "ends with end-token".

TestCentre/PropertyTests.fs

@@ -130,11 +130,12 @@
             Check.Quick results
 
         [<Property>]
-        let ``RequestTextFromFile returns a string which ends with a full stop when using test-post`` () =
+        let ``RequestTextFromFile returns a string which ends with with the correct end-token when using test-post`` () =
             let test () =
                 Pancake.RequestTextFromFileAsync (ValidGibberishLevelInput()) (ValidSentencesInput()) TestPost
                 |> Async.RunSynchronously
-            let results = Assert.EndsWith(".", test())
+                |> EndsAsIntended
+            let results = Assert.True(test())
             Check.Quick results
 
         [<Property>]