Update identation in imports block for factory examples

Author: rmk135

examples/providers/factory.py

@@ -1,6 +1,7 @@
 """`Factory` providers example."""
 
 import collections
+
 import dependency_injector.providers as providers
 
 

examples/providers/factory_delegation.py

@@ -1,6 +1,7 @@
 """`Factory` providers delegation example."""
 
 import collections
+
 import dependency_injector.providers as providers
 
 

examples/providers/factory_init_injections.py

@@ -1,6 +1,7 @@
 """`Factory` providers init injections example."""
 
 import collections
+
 import dependency_injector.providers as providers