fix: update Feature.__repr__ & add __eq__

Problems fixed:

 - Feature repr did not include feature_extractor since that API was changed
 - Intervals that were equivalent were not equal, so Features were not properly
   sorted or equal

pipeline/utils.py

@@ -179,6 +179,9 @@ class Interval():
             return self.end < other.end
         return self.start < other.start
 
+    def __eq__(self, other):
+        return self.start == other.start and self.end == other.end
+
     def to_json(self):
         """Return a dict representation of the interval for JSON encoding
 
@@ -268,7 +271,7 @@ class Feature():
                    feature_extractor=feature_extractor, score=score)
 
     def __repr__(self):
-        return f"Feature({self.interval}, {self.source}, {self.score})"
+        return f"Feature({self.interval}, {self.source}, {self.feature_extractor}, {self.score})"
 
     def __lt__(self, other):
         """Sort based on interval, then feature_extractor, then score"""
@@ -278,6 +281,12 @@ class Feature():
             return self.feature_extractor < other.feature_extractor
         return self.interval < other.interval
 
+    def __eq__(self, other):
+        return self.interval == other.interval \
+            and self.source == other.source \
+            and self.feature_extractor == other.feature_extractor \
+            and self.score == other.score
+
     def to_json(self):
         """Return a dict representation of the feature for JSON encoding