tests: make sure git commands are run in temp repository

Author: sigma

tests/magit-tests.el

@@ -11,12 +11,14 @@
 
 (defmacro with-temp-git-repo (repo &rest body)
   (declare (indent 1) (debug t))
-  `(let ((,repo (make-temp-file "tmp_git" t)))
+  `(let* ((,repo (make-temp-file "tmp_git" t))
+          (default-directory (concat ,repo "/")))
      (unwind-protect
          (progn
            (magit-init repo)
            ,@body)
-       (delete-directory ,repo t))))
+       (delete-directory ,repo t)
+       )))
 
 (defun magit-tests-section-has-item-title (title &optional section-path)
   (let ((children (magit-section-children