object patch

Solutions/6_3/portfolio.py

@@ -1,6 +1,6 @@
 # portfolio.py
 
-class Portfolio(object):
+class Portfolio:
     def __init__(self, holdings):
         self._holdings = holdings
 

Solutions/6_3/stock.py

@@ -1,6 +1,6 @@
 # stock.py
 
-class Stock(object):
+class Stock:
     '''
     An instance of a stock holding consisting of name, shares, and price.
     '''

Solutions/6_3/tableformat.py

@@ -1,6 +1,6 @@
 # tableformat.py
 
-class TableFormatter(object):
+class TableFormatter:
     def headings(self, headers):
         '''
         Emit the table headers