Minor fixes to formatting nits introduced in the duration PR

Author: absurdfarce

integration/types/duration_test.rb

@@ -37,7 +37,7 @@ def test_can_insert_duration
     }
     session.execute 'CREATE TABLE bar ("name" varchar, "dur" duration, primary key ("name"))'
 
-    insert = Retry.with_attempts(5) { session.prepare "INSERT INTO foo.bar (name,dur) VALUES (?,?)" }    
+    insert = Retry.with_attempts(5) { session.prepare "INSERT INTO foo.bar (name,dur) VALUES (?,?)" }
     durations.each_pair do |key,val|
       Retry.with_attempts(5) { session.execute insert, arguments: [key,val] }
     end

lib/cassandra/duration.rb

@@ -75,7 +75,7 @@ def eql?(other)
       alias == eql?
 
       def self.cql_type
-        Type.new(@kind)        
+        Type.new(@kind)
       end
 
       # Requirements for CustomData module