tests: Add boolean-as-integer formatting tests for fixed regression.

As suggested by @dpgeorge in #5538.

tests/basics/string_format.py

@@ -63,6 +63,12 @@ test("{:>20}", "foo")
 test("{:^20}", "foo")
 test("{:<20}", "foo")
 
+# formatting bool as int
+test('{:d}', False)
+test('{:20}', False)
+test('{:d}', True)
+test('{:20}', True)
+
 # nested format specifiers
 print("{:{}}".format(123, '#>10'))
 print("{:{}{}{}}".format(123, '#', '>', '10'))

tests/basics/string_format_modulo.py

@@ -40,6 +40,9 @@ print("%c" % 'a')
 print("%10s" % 'abc')
 print("%-10s" % 'abc')
 
+print('%c' % False)
+print('%c' % True)
+
 # Should be able to print dicts; in this case they aren't used
 # to lookup keywords in formats like %(foo)s
 print('%s' % {})

tests/float/string_format.py

@@ -24,6 +24,9 @@ test("{:06e}", float("inf"))
 test("{:06e}", float("-inf"))
 test("{:06e}", float("nan"))
 
+test('{:f}', False)
+test('{:f}', True)
+
 # The following fails right now
 #test("{:10.1}", 0.0)