Fix coverage

Author: mikaem

mpi4py_fft/mpifft.py

@@ -360,7 +360,7 @@ def local_slice(self, forward_output=True):
                                                                    ip.subshape)]
         return tuple(s)
 
-    def local_shape(self, forward_output=False):
+    def local_shape(self, forward_output=False): #pragma: no cover
         """The local (to each processor) shape of data
 
         Parameters