Multiyearstat.py.test.in: added CDO option --pedantic for diff.

test/pytest/Multiyearstat.py.test.in

@@ -25,7 +25,7 @@ for TYPE in OPERTYPES:
         t = TAPTest(f'{OPERATOR}')
         for FM in FMS:
             t.add(f'{CDO}  -f {FM} {OPERATOR} {IFILE} {OFILE}')
-            t.add(f'{CDO} diff,abslim=0.004 {OFILE} {RFILE}')
+            t.add(f'{CDO} --pedantic diff,abslim=0.004 {OFILE} {RFILE}')
             t.clean(OFILE)
         test_module.add(t)
 
@@ -44,7 +44,7 @@ for TYPE in OPERTYPES:
         t = TAPTest(f'{OPERATOR}  +missvals')
         for FM in FMS:
             t.add(f'{CDO}  -f {FM} {OPERATOR} {IFILE} {OFILE}')
-            t.add(f'{CDO} diff,abslim=0.004 {OFILE} {RFILE}')
+            t.add(f'{CDO} --pedantic diff,abslim=0.004 {OFILE} {RFILE}')
             t.clean(OFILE)
         test_module.add(t)