♻ Make changes so it's closer to main branch

♻Rewrite to make things conform closer to main branch

♻ Fix f string

♻ Change to f string

And also switch to the accept header recommended in https://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template

♻ Move away from `application/vnd.github.baptiste-preview+json`

✅Make tests pass

✅Fix tests

🎨 FIX: the formatting by running `tox -elint`

github/AuthenticatedUser.py

@@ -517,7 +517,7 @@ def create_repo_from_template(
         private=github.GithubObject.NotSet,
     ):
         """
-        :calls: `POST /repos/{template_owner}/{template_repo}/generate <http://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template>`_
+        :calls: `POST /repos/{template_owner}/{template_repo}/generate <https://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template>`_
         :param name: string
         :param repo :class:`github.Repository.Repository`
         :param description: string
@@ -529,7 +529,9 @@ def create_repo_from_template(
         assert description is github.GithubObject.NotSet or isinstance(
             description, str
         ), description
-        assert private is github.GithubObject.NotSet or isinstance(private, bool), private
+        assert private is github.GithubObject.NotSet or isinstance(
+            private, bool
+        ), private
         post_parameters = {
             "name": name,
             "owner": self.login,
@@ -542,9 +544,11 @@ def create_repo_from_template(
             "POST",
             f"/repos/{repo.owner.login}/{repo.name}/generate",
             input=post_parameters,
-            headers={"Accept": Consts.mediaTypeTemplatesPreview},
+            headers={"Accept": "application/vnd.github.v3+json"},
+        )
+        return github.Repository.Repository(
+            self._requester, headers, data, completed=True
         )
-        return github.Repository.Repository(self._requester, headers, data, completed=True)
 
     def create_gist(self, public, files, description=github.GithubObject.NotSet):
         """

github/Organization.py

@@ -411,7 +411,7 @@ def create_repo_from_template(
         private=github.GithubObject.NotSet,
     ):
         """self.name
-        :calls: `POST /repos/{template_owner}/{template_repo}/generate <http://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template>`_
+        :calls: `POST /repos/{template_owner}/{template_repo}/generate <https://docs.github.com/en/rest/reference/repos#create-a-repository-using-a-template>`_
         :param name: string
         :param repo :class:`github.Repository.Repository`
         :param description: string
@@ -436,9 +436,9 @@ def create_repo_from_template(
             post_parameters["private"] = private
         headers, data = self._requester.requestJsonAndCheck(
             "POST",
-            "/repos/" + repo.owner.login + "/" + repo.name + "/generate",
+            f"/repos/{repo.owner.login}/{repo.name}/generate",
             input=post_parameters,
-            headers={"Accept": Consts.mediaTypeTemplatesPreview},
+            headers={"Accept": "application/vnd.github.v3+json"},
         )
         return github.Repository.Repository(
             self._requester, headers, data, completed=True