improve wording

Author: emanuel-schmid

climada_petals/hazard/test/test_drought.py

@@ -27,8 +27,8 @@
 class TestReader(unittest.TestCase):
     """Test loading functions from the Drought class"""
 
-    # for running this test, drought must be set up first, which by default requires downloading
-    # 340M file from https://digital.csic.es/, if it is not present
+    # when running this test, drought will be _set up_ first, which by default involves
+    # downloading a 340M file from https://digital.csic.es/, if it is not already present
     # for saving resources we skip the test unless the file has been downloaded beforehand
     @unittest.skipUnless(Path(SPEI_FILE_DIR, SPEI_FILE_NAME).is_file(),
         "the SPEI file is missing, run `Drought().setup()` before running this test")