fixed lint oopsie & added to docstring on feature reference string co…

…nvention

Signed-off-by: David Y Liu <davidyliuliu@gmail.com>

sdk/python/feast/feature_service.py

@@ -26,7 +26,8 @@ class FeatureService:
     Args:
         name: Unique name of the feature service.
         features: A list of Features that are grouped as part of this FeatureService.
-            The list may contain Feature Views, Feature Tables, or a subset of either.
+            The list may contain Feature Views, Feature Tables, or a subset of either. The
+            strings should be in the format 'my_feature_view:my_feature'.
         tags (optional): A dictionary of key-value pairs used for organizing Feature
             Services.
     """

sdk/python/feast/feature_view.py

@@ -401,7 +401,7 @@ def get_projection(self, feature_view):
         that's passed in as the argument. This allows users to make modifications to a FeatureView object
         (e.g. the name) and then projecting those changes onto the corresponding actual FeatureView from the registry.
         Currently all FeatureViews that are used must be registered and this method enables modifying those FeatureViews
-        while still making sure we're pulling the most up-to-date FeatureView from the registry to modify from. 
+        while still making sure we're pulling the most up-to-date FeatureView from the registry to modify from.
 
         Currently, only `FeatureView.features` is the field that's replaced the features from feature_view.