Revert "gnu: python-mako: Improve package style."

This reverts commit 53f58596c9.

This introduces too many rebuilds.

Change-Id: I6f7e1a01df90db4f51d3d64140740e7f29339f3d

gnu/packages/python-xyz.scm

@@ -19234,14 +19234,13 @@ of @acronym{REGEXPs, regular expressions}.")
          "0gqnv9py1dqp01jmf5zxp0vj2dbhq1l9zy55fai319iv6sdqc91p"))))
     (build-system python-build-system)
     (arguments
-     (list
-      #:phases
-      #~(modify-phases %standard-phases
-          (replace 'check
-            (lambda* (#:key tests? #:allow-other-keys)
-              (if tests?
-                  (invoke "pytest" "-vv")
-                  (format #t "test suite not run~%")))))))
+     `(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda* (#:key tests? #:allow-other-keys)
+                      (if tests?
+                          (invoke "pytest" "-vv")
+                          (format #t "test suite not run~%"))
+                      #t)))))
     (propagated-inputs
      (list python-markupsafe))
     (native-inputs