Fixed calling DisplayViewer or XVViewer without a title #6136
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Requested in 8da8013#r68650261
Resolves #6146
That comment points out that
Pillow/src/PIL/ImageShow.py
Lines 51 to 61 in 6faebd3
title
toNone
, which is then passed (throughViewer.show
andshow_image
) toDisplayViewer
andXVViewer
asNone
for one of the values passed tosubprocess.Popen
.This problem was introduced in #6010.