Merge pull request #646 from rjleveque/fix_storm_quotes

Trying to fix storm.py

Author: rjleveque

src/python/geoclaw/surge/storm.py

@@ -1065,9 +1065,9 @@ def write_geoclaw(self, path, force=False, skip=True, verbose=False,
             with open(path, "w") as data_file:
                 # Write header
                 data_file.write(f"{num_casts}\n")
-                if isinstance(self.time_offset, datetime.datetime):
-                    data_file.write(f"{np.datetime_as_string(self.time_offset, 
-                                                             unit="s")}\n\n")
+                if isinstance(self.time_offset, np.datetime64):
+                    data_file.write(\
+                      f"{np.datetime_as_string(self.time_offset,unit='s')}\n\n")
                 else:
                     data_file.write(f"{str(self.time_offset)}\n\n")