; Fix backslashes in python-tests

; Fix backslashes in python-tests

* test/lisp/progmodes/python-tests.el (python-indent-after-backslash-1)
(python-indent-after-backslash-2)
(python-indent-after-backslash-3)
(python-indent-after-backslash-4)
(python-indent-after-backslash-5)
(python-nav-beginning-of-statement-1)
(python-nav-end-of-statement-1)
(python-nav-forward-statement-1)
(python-nav-backward-statement-1)
(python-nav-backward-statement-2)
(python-info-statement-starts-block-p-2)
(python-info-statement-ends-block-p-2)
(python-info-beginning-of-statement-p-2)
(python-info-end-of-statement-p-2)
(python-info-beginning-of-block-p-2)
(python-info-end-of-block-p-2)
(python-info-line-ends-backslash-p-1)
(python-info-beginning-of-backslash-1)
(python-info-continuation-line-p-1)
(python-info-block-continuation-line-p-1)
(python-info-assignment-statement-p-1)
(python-info-assignment-continuation-line-p-1): Backslashes in
literals should be doubled only once to produce one backslash in the
buffer.  If there backslashes inside a Python string literal in a Lisp
literal, that would need to be doubled twice, but there are no such
cases.  Note that `python-tests-looking-at' takes a plain string, not
a regexp.