Update catalogs and providers error messages

dependency_injector/catalogs.py

@@ -336,8 +336,8 @@ class DynamicCatalog(object):
 
         if (self.__class__.provider_type and
                 not isinstance(provider, self.__class__.provider_type)):
-            raise Error('{0} can contaon only {1} instances'.format(
-                self.name, self.__class__.provider_type))
+            raise Error('{0} can contain only {1} instances'.format(
+                self, self.__class__.provider_type))
 
         if name in self.providers:
             raise Error('Catalog {0} already has provider with '

dependency_injector/providers.py

@@ -407,9 +407,7 @@ class Factory(Callable):
         if (self.__class__.provided_type and
                 not issubclass(provides, self.__class__.provided_type)):
             raise Error('{0} can provide only {1} instances'.format(
-                '.'.join((self.__class__.__module__,
-                          self.__class__.__name__)),
-                self.__class__.provided_type))
+                self.__class__, self.__class__.provided_type))
 
         self.attributes = tuple(injection
                                 for injection in args

examples/providers/factory_provided_type.py

@@ -31,5 +31,5 @@ try:
     some_service_provider = ServiceProvider(object)
 except errors.Error as exception:
     print exception
-    # __main__.ServiceProvider can provide only
+    # <class '__main__.ServiceProvider'> can provide only
     # <class '__main__.BaseService'> instances

examples/providers/singleton_provided_type.py

@@ -31,5 +31,5 @@ try:
     some_service_provider = ServiceProvider(object)
 except errors.Error as exception:
     print exception
-    # __main__.ServiceProvider can provide only
+    # <class '__main__.ServiceProvider'> can provide only
     # <class '__main__.BaseService'> instances