Fix TypeError when using this debug

We need to make a copy of locals() from the method
level as inside the list comprehension its value change
and we lose access to method's arguments and their
values.

Thanks to Ben Roberts for reporting the issue!

pypuppetdb/api/base.py

@@ -325,10 +325,12 @@ def _query(self, endpoint=None, path=None, query=None,
         :rtype: :obj:`dict` or :obj:`list`
         """
 
-        log.debug("_query called with ",
+        # inside the list comprehension the locals() value change so we need a function's local() copy
+        function_locals = locals().copy()
+        log.debug("_query called with: " +
                   # comma-separated list of method arguments with their values
-                  ", ".join([f"{arg}: {locals().get(arg, 'None')}"
-                             for arg in locals().keys() if arg != 'self'])
+                  ", ".join([f"{arg}={function_locals.get(arg, 'None')}"
+                             for arg in function_locals.keys() if arg != 'self'])
                   )
 
         if not endpoint: