Fix two tests related to darwin and recent git

src/e3/vcs/git.py

@@ -147,16 +147,22 @@ def git_cmd(
             )
         return p
 
-    def init(self, url: str | None = None, remote: str | None = "origin") -> None:
+    def init(
+        self,
+        url: str | None = None,
+        remote: str | None = "origin",
+        initial_branch: str = "master",
+    ) -> None:
         """Initialize a new Git repository and configure the remote.
 
         :param url: url of the remote repository, if None create a local git
             repository
         :param remote: name of the remote to create
+        :param initial_branch: name of the initial branch (default is master)
         :raise: GitError
         """
         e3.fs.mkdir(self.working_tree)
-        self.git_cmd(["init", "-q"])
+        self.git_cmd(["init", "-q", f"--initial-branch={initial_branch}"])
 
         # Git version 1.8.3.1 might crash when calling "git stash" when
         # .git/logs/refs is not created. Recent versions of git do not

tests/tests_e3/os/process/main_test.py

@@ -120,7 +120,7 @@ def run_test():
         e.restore()
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="A linux test")
+@pytest.mark.skipif(not sys.platform.startswith("linux"), reason="A linux test")
 def test_rlimit_ctrl_c():
     """Test rlimit CTRL-C.
 
@@ -193,7 +193,7 @@ def test_rlimit_ctrl_c():
     assert int(end - start) < 30, f"CTRL-C failed: take {int(end - start)} seconds"
 
 
-@pytest.mark.skipif(sys.platform == "win32", reason="A linux test")
+@pytest.mark.skipif(not sys.platform.startswith("linux"), reason="A linux test")
 def test_rlimit_foreground_option():
     """Test rlimit --foreground.