additional test case for Python 3 function annotation syntax

tests/run/cython3.pyx

@@ -231,3 +231,12 @@ def int_literals():
     print(cython.typeof(10000000000000L))
     print(cython.typeof(1UL))
     print(cython.typeof(10000000000000UL))
+
+def annotation_syntax(a : "test", b : "other" = 2) -> "ret":
+    """
+    >>> annotation_syntax(1)
+    3
+    >>> annotation_syntax(1,3)
+    4
+    """
+    return a+b