use ternary operator (recommended by style check)

src/mpsd_software_manager/cmds/available.py

@@ -58,10 +58,7 @@ def get_available_package_sets(
     tmp_dir_path = Path(tmp_dir.name)
 
     # find package_sets by cloning repository and checking out right branch
-    if allow_unreleased_branch:
-        spe_branch = mpsd_release
-    else:
-        spe_branch = f"releases/{mpsd_release}"
+    spe_branch = mpsd_release if allow_unreleased_branch else f"releases/{mpsd_release}"
 
     clone_repo(
         tmp_dir_path,

src/mpsd_software_manager/cmds/prepare.py

@@ -72,10 +72,9 @@ def prepare_environment(
     else:
         repo_url = config_vars.spack_environments_repo
         logging.info(f"cloning repository {folders.repo_path} from {repo_url}")
-        if allow_unreleased_branch:
-            spe_branch = mpsd_release
-        else:
-            spe_branch = f"releases/{mpsd_release}"
+        spe_branch = (
+            mpsd_release if allow_unreleased_branch else f"releases/{mpsd_release}"
+        )
         clone_repo(folders.repo_path, repo_url, branch=spe_branch)
 
     logging.getLogger("print").info(