fix line too long

Author: jcupitt

pyvips/gvalue.py

@@ -57,7 +57,7 @@ class GValue(object):
  _gtype_to_python = {
  gbool_type: 'bool',
  gint_type: 'int',
- guint64_type: 'long', # Note: int and long have been unified in Python 3
+ guint64_type: 'long', # Note: int and long are unified in Python 3
  gdouble_type: 'float',
  gstr_type: 'str',
  refstr_type: 'str',