[issue27067] Improve curses tests

[Roundup Robot]

Roundup Robot added the comment:

New changeset 433839643bbb by Serhiy Storchaka in branch '3.5':
Temporary skip curses tests on non-tty (issue #27067).
https://hg.python.org/cpython/rev/433839643bbb

New changeset debe693c62b4 by Serhiy Storchaka in branch 'default':
Temporary skip curses tests on non-tty (issue #27067).
https://hg.python.org/cpython/rev/debe693c62b4

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<http://bugs.python.org/issue27067>
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