Should TimezoneComponent.prettyPrint() have default arguments?

[da4089]

Import from: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=849882

Should the TimezoneComponent.prettyPrint() function use the same default
values as the equivalent function in other classes? I discovered that
The method in TimezoneComponent have this prototype:

def prettyPrint(self, level, tabwidth):

While the base class Component have this prototype:

def prettyPrint(self, level = 0, tabwidth=3):

This made my code fail with this message:

<VTIMEZONE | <TZID{}Europe/Stockholm>>
Traceback (most recent call last):
  File "/home/pere/bin/ical-split", line 119, in <module>
    print c.prettyPrint()
TypeError: prettyPrint() takes exactly 3 arguments (1 given)

This code demonstrates the problem:

import vobject
icalstream = open(file)
components = vobject.readComponents(icalstream, validate=True)
cal = components.next()
for c in cal.getChildren():
    print c.prettyPrint()

[rsb-23]

This is a method signature mismatch issue, and it can be fixed/avoided by using linters.
There can be other methods with this issue and similar issues.
So, I think all can be addressed when linters are added.