Rename mixing to mixin. (#317)

Author: jmcarp

pendulum/date.py

@@ -9,7 +9,7 @@
 
 from .helpers import add_duration
 from .period import Period
-from .mixins.default import FormattableMixing
+from .mixins.default import FormattableMixin
 from .constants import (
     DAYS_PER_WEEK,
     YEARS_PER_DECADE,
@@ -26,7 +26,7 @@
 from .exceptions import PendulumException
 
 
-class Date(FormattableMixing, date):
+class Date(FormattableMixin, date):
 
     # Names of days of the week
     _days = {

pendulum/mixins/default.py

@@ -3,7 +3,7 @@
 _formatter = Formatter()
 
 
-class FormattableMixing(object):
+class FormattableMixin(object):
 
     _formatter = _formatter
 

pendulum/time.py

@@ -5,11 +5,11 @@
 from datetime import time, timedelta
 
 from .duration import Duration, AbsoluteDuration
-from .mixins.default import FormattableMixing
+from .mixins.default import FormattableMixin
 from .constants import USECS_PER_SEC, SECS_PER_HOUR, SECS_PER_MIN
 
 
-class Time(FormattableMixing, time):
+class Time(FormattableMixin, time):
     """
     Represents a time instance as hour, minute, second, microsecond.
     """