gnu: emacs-elisp-refs: Disable test failing on Emacs 27.1.

* gnu/packages/emacs-xyz.scm (emacs-elisp-refs)[arguments]:
Add phase to disable failing test "elisp-refs-next-match" on emacs27.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>

gnu/packages/emacs-xyz.scm

@@ -14827,7 +14827,17 @@ (define-public emacs-elisp-refs
        ("emacs-undercover" ,emacs-undercover)))
     (arguments
      `(#:tests? #t
-       #:test-command '("ert-runner")))
+       #:test-command '("ert-runner")
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'disable-refs-next-match-test
+           ;; Hack to disable the failing test for emacs27
+           ;; https://github.com/Wilfred/elisp-refs/issues/29
+           (lambda _
+             (substitute* "test/unit-test.el"
+               (("ert-deftest elisp-refs-next-match")
+                "defun elisp-refs-next-match"))
+             #t)))))
     (home-page "https://github.com/Wilfred/elisp-refs")
     (synopsis "Find callers of elisp functions or macros")
     (description "Find references to functions, macros or variables.  Unlike a