test-export-named-branch: avoid randomness in test output
I randomly had different outputs when running this test. Sorting the output fixes the issue.
Example of outputs:
--- /workspace/octobus/hg-git-heptapod/tests/test-export-named-branch.t
+++ /workspace/octobus/hg-git-heptapod/test-export-named-branch.t.err
@@ -36,8 +36,8 @@
$ find .git/refs/heads
.git/refs/heads
.git/refs/heads/branch
- .git/refs/heads/branch/default
.git/refs/heads/branch/foo
.git/refs/heads/branch/bar
+ .git/refs/heads/branch/default
--- /workspace/octobus/hg-git-heptapod/tests/test-export-named-branch.t
+++ /workspace/octobus/hg-git-heptapod/test-export-named-branch.t.err
@@ -36,8 +36,8 @@
$ find .git/refs/heads
.git/refs/heads
.git/refs/heads/branch
+ .git/refs/heads/branch/foo
.git/refs/heads/branch/default
- .git/refs/heads/branch/foo
.git/refs/heads/branch/bar