gnu: python-prompt-toolkit: Update to 2.0.7.

* gnu/packages/python.scm (python-prompt-toolkit): Update to 2.0.7.
[arguments]: Enable tests; add phase "post-install-check" and delete "check"
phase.
[native-inputs]: Add python-pytest.

gnu/packages/python.scm

@@ -9890,21 +9890,32 @@ collections of data.")
 (define-public python-prompt-toolkit
   (package
     (name "python-prompt-toolkit")
-  (version "1.0.15")
+    (version "2.0.7")
     (source
      (origin
        (method url-fetch)
        (uri (pypi-uri "prompt_toolkit" version ".tar.gz"))
        (sha256
         (base32
-          "05v9h5nydljwpj5nm8n804ms0glajwfy1zagrzqrg91wk3qqi1c5"))))
+         "0fgacqk73w7s932vy46pan2yp8rvjmlkag20xvaydh9mhf6h85zx"))))
     (build-system python-build-system)
     (arguments
-   '(#:tests? #f)) ; The test suite uses some Windows-specific data types.
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'check)
+         (add-after 'install 'post-install-check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             ;; HOME is needed for the test
+             ;; "test_pathcompleter_can_expanduser".
+             (setenv "HOME" "/tmp")
+             (add-installed-pythonpath inputs outputs)
+             (invoke "py.test"))))))
     (propagated-inputs
      `(("python-wcwidth" ,python-wcwidth)
        ("python-six" ,python-six)
        ("python-pygments" ,python-pygments)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
     (home-page "https://github.com/jonathanslenders/python-prompt-toolkit")
     (synopsis "Library for building command line interfaces in Python")
     (description