Try to avoid test failures due to fragile float formatting in memory view output.

tests/memoryview/numpy_memoryview.pyx

@@ -293,13 +293,13 @@ def test_coerce_to_numpy():
     deallocating...
     12.2
     deallocating...
-    13.3
+    13.25
     deallocating...
     (14.4+15.5j)
     deallocating...
-    (16.6+17.7j)
+    (16.5+17.7j)
     deallocating...
-    (18.8+19.9j)
+    (18.8+19.96j)
     deallocating...
     22
     deallocating...
@@ -365,11 +365,11 @@ def test_coerce_to_numpy():
 
     floats[idx] = 11.1
     doubles[idx] = 12.2
-    longdoubles[idx] = 13.3
+    longdoubles[idx] = 13.25
 
     floatcomplex[idx] = 14.4 + 15.5j
-    doublecomplex[idx] = 16.6 + 17.7j
-    longdoublecomplex[idx] = 18.8 + 19.9j
+    doublecomplex[idx] = 16.5 + 17.7j
+    longdoublecomplex[idx] = 18.8 + 19.96j
 
     h_shorts[idx] = 22
     h_doubles[idx] = 33.33