Fix small typo

Signed-off-by: Hritik Vijay <hritikxx8@gmail.com>

Author: Hritik14

src/univers/version_constraint.py

@@ -254,7 +254,7 @@ def validate(cls, constraints):
     def simplify(cls, constraints):
         """
         Return a new simplified ``constraints`` list with duplicated constraints
-        removed. This includes removing exact duplicates adn redundant
+        removed. This includes removing exact duplicates and redundant
         constraints.
         """
         constraints = deduplicate(constraints)

src/univers/version_range.py

@@ -38,7 +38,7 @@ class VersionRange:
     # PypiVersion. Subclasses MUST provide this.
     version_class = None
 
-    # A list of lists of VersionConstraint that are signposts on the versions
+    # A tuple of VersionConstraint that are signposts on the versions
     # timeline
     constraints = attr.ib(type=tuple, default=attr.Factory(tuple))