restore test_tide_gauge_method test. Added note

Author: jpolton

unit_testing/test_tidegauge_methods.py

@@ -50,7 +50,8 @@ def test_demean_timeseries(self):
         # Test that the mean has been removed
         timeseries = lowestoft.dataset.ssh[0, :].values
         demeaned = timeseries - np.nanmean(timeseries)
-        self.assertTrue((np.isclose(tg1.dataset.ssh[0, :].values, demeaned)).all(), "check1")
+        self.assertTrue(np.array_equal(tg1.dataset.ssh[0, :].values, demeaned), "check1")        
+        #self.assertTrue((np.isclose(tg1.dataset.ssh[0, :].values, demeaned)).all(), "check1")  # might need this with later numpy>1.26 versions
 
     def test_harmonic_analysis_utide(self):
         tganalysis = coast.TidegaugeAnalysis()