Tweak test to show the difference between -> or |> and ** in printing.

Author: cristianoc

tests/printer/expr/expected/pipe.res.txt

@@ -1,3 +1,8 @@
 let s1 = @ann x->foo
-let s2 = @ann foo(x)
-let s3 = @ann x |> foo
+let s1b = (@ann x)->foo
+
+let s2 = @ann x |> foo
+let s2b = (@ann x) |> foo
+
+let s3 = @ann (x ** foo)
+let s3b = (@ann x) ** foo

tests/printer/expr/pipe.res

@@ -1,3 +1,8 @@
 let s1 = @ann (x->foo)
-let s2 = @ann (foo(x))
-let s3 = @ann (x|>foo)
+let s1b = @ann x->foo
+
+let s2 = @ann (x|>foo)
+let s2b = @ann x|>foo
+
+let s3 = @ann (x**foo)
+let s3b = @ann x**foo