[issue19504] Change "customise" to "customize".

[Fred L. Drake, Jr.]

Fred L. Drake, Jr. added the comment:

Not a foolish consistency; Guido ruled long ago that American spellings should be used.

----------
nosy: +fdrake

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19504>
_______________________________________