make query_survey raise a warning (...as an exception) since we've added

an 's' to the task

Author: keflavich

astroquery/eso/core.py

@@ -732,6 +732,11 @@ def _print_instrument_help(self, url, instrument, cache=True):
         print("\n".join(result_string))
         return result_string
 
+    def query_survey(self, **kwargs):
+        raise DeprecationWarning("query_survey is deprecated; use "
+                                 "query_surveys instead.  It should "
+                                 "accept the same arguments.")
+
     def _print_surveys_help(self, url, cache=True):
         """
         Download a form and print it in a quasi-human-readable way