docs: edit deprecation message with matching filter name instead of placeholder

Author: ManonMarchand

astroquery/simbad/core.py

@@ -392,12 +392,13 @@ def add_votable_fields(self, *args):
                                  "https://astroquery.readthedocs.io/en/latest/simbad/simbad_evolution.html"
                                  " to see the new ways to interact with SIMBAD's fluxes.")
             if re.match(r"^flux.*\(.+\)$", arg):
-                warnings.warn("The notation 'flux(XXX)' is deprecated since 0.4.8 in favor of 'XXX'. "
-                              "You will see the column appearing with its new name in the output. "
-                              "See section on filters in "
+                filter_name = re.findall(r"\((\w+)\)", arg)[0]
+                warnings.warn(f"The notation 'flux({filter_name})' is deprecated since 0.4.8 in favor of "
+                              f"'{filter_name}'. You will see the column appearing with its new name "
+                              "in the output. See section on filters in "
                               "https://astroquery.readthedocs.io/en/latest/simbad/simbad_evolution.html "
                               "to see the new ways to interact with SIMBAD's fluxes.", DeprecationWarning, stacklevel=2)
-                fluxes_to_add.append(re.findall(r"\((\w+)\)", arg)[0])
+                fluxes_to_add.append(filter_name)
                 args.remove(arg)
 
         # output options

astroquery/simbad/tests/test_simbad.py

@@ -271,7 +271,7 @@ def test_add_votable_fields_errors():
     simbad_instance = simbad.SimbadClass()
     with pytest.raises(ValueError, match=r"The votable fields \'flux_\*\*\*\(filtername\)\' are removed *"):
         simbad_instance.add_votable_fields("flux_error(u)")
-    with pytest.warns(DeprecationWarning, match=r"The notation \'flux\(XXX\)\' is deprecated since 0.4.8 *"):
+    with pytest.warns(DeprecationWarning, match=r"The notation \'flux\(u\)\' is deprecated since 0.4.8 *"):
         simbad_instance.add_votable_fields("flux(u)")
         assert "u_" in str(simbad_instance.columns_in_output)
     # big letter J filter exists, but not small letter j
@@ -312,7 +312,7 @@ def test_add_votable_fields_errors():
 def test_add_list_of_fluxes():
     # regression test for https://github.com/astropy/astroquery/issues/3185#issuecomment-2599191953
     simbad_instance = simbad.Simbad()
-    with pytest.warns(DeprecationWarning, match=r"The notation \'flux\(XXX\)\' is deprecated since 0.4.8 *"):
+    with pytest.warns(DeprecationWarning, match=r"The notation \'flux\([UJ]\)\' is deprecated since 0.4.8 *"):
         simbad_instance.add_votable_fields("flux(U)", "flux(J)")