lsremote: set max split when parsing remotes (#9292)

Ref https://sentry.io/organizations/read-the-docs/issues/3227717706/?project=148442&referrer=regression_activity-email

Author: stsewd

readthedocs/rtd_tests/tests/test_backend.py

@@ -59,6 +59,7 @@ def test_git_lsremote(self):
             '2.0.X',
             'release/2.0.0',
             'release/foo/bar',
+            "with\xa0space",
         ]
         for branch in branches:
             create_git_branch(repo_path, branch)

readthedocs/vcs_support/backends/git.py

@@ -228,7 +228,7 @@ def lsremote(self, include_tags=True, include_branches=True):
         all_tags = {}
         light_tags = {}
         for line in stdout.splitlines():
-            commit, ref = line.split()
+            commit, ref = line.split(maxsplit=1)
             if ref.startswith("refs/heads/"):
                 branch = ref.replace("refs/heads/", "", 1)
                 branches.append(VCSVersion(self, branch, branch))