gnu: uncrustify: use new style and gexp.

* gnu/packages/code.scm (uncrustify): use new style and gexp.
[native-inputs]: remove label.
[arguments]: use gexp and remove tail #t.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/code.scm

@@ -805,11 +805,10 @@ independent targets.")
                (base32
                 "17x9p5pqgzjchi9xhskp4kq7ag4chmsgbkvwym5m2b9zwm6qykpm"))))
     (build-system cmake-build-system)
-    (native-inputs
-     `(("python" ,python-wrapper)))
+    (native-inputs (list python-wrapper))
     (arguments
-     `(#:phases
-       (modify-phases %standard-phases
+     (list #:phases
+           #~(modify-phases %standard-phases
                (add-after 'unpack 'unpack-etc
                  (lambda* (#:key inputs outputs #:allow-other-keys)
                    ;; Configuration samples are not installed by default.
@@ -817,8 +816,7 @@ independent targets.")
                           (etcdir (string-append output "/etc")))
                      (for-each (lambda (l)
                                  (install-file l etcdir))
-                         (find-files "etc" "\\.cfg$")))
-             #t)))))
+                               (find-files "etc" "\\.cfg$"))))))))
     (home-page "https://uncrustify.sourceforge.net/")
     (synopsis "Code formatter for C and other related languages")
     (description