style: ruff format — collapse two-line hostname file path + version loop

Format-only diff from `ruff format`. The 26.5-alpha push's CI run failed
on `ruff format --check`; these three files had two-line constructs that
fit on one line at ruff's default line length. No behaviour change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_updater.py

@@ -215,9 +215,7 @@ def test_refresh_caddyfile_substitutes_hostname_placeholder(updater, tmp_path):
     # this the named-hostname :443 block ships with a literal
     # `__FURTKA_HOSTNAME__` and Caddy refuses to load the config.
     src = tmp_path / "src"
-    src.write_text(
-        "__FURTKA_HOSTNAME__.local, __FURTKA_HOSTNAME__ {\n\ttls internal\n}\n"
-    )
+    src.write_text("__FURTKA_HOSTNAME__.local, __FURTKA_HOSTNAME__ {\n\ttls internal\n}\n")
     assert updater._refresh_caddyfile(src) is True
     live = updater._CADDYFILE_LIVE.read_text()
     assert "testbox.local, testbox {" in live

tests/test_webinstaller_assets.py

@@ -172,9 +172,7 @@ def test_post_install_substitutes_hostname_in_caddyfile(install_cmds):
     # with the hostname the user picked in the form. The `testhost` value
     # comes from the install_cmds fixture. Without substitution Caddy's
     # `tls internal` never issues a leaf cert for the real hostname.
-    caddyfile_cmd = next(
-        (c for c in install_cmds if " > /etc/caddy/Caddyfile" in c), None
-    )
+    caddyfile_cmd = next((c for c in install_cmds if " > /etc/caddy/Caddyfile" in c), None)
     assert caddyfile_cmd is not None
     written = _extract_written_content(caddyfile_cmd, "/etc/caddy/Caddyfile")
     assert "__FURTKA_HOSTNAME__" not in written

webinstaller/app.py

@@ -49,6 +49,7 @@ FURTKA_VERSION = _resolve_version()
 def _inject_version():
     return {"furtka_version": FURTKA_VERSION}
 
+
 LANGUAGES = {
     "en": {"locale": "en_US.UTF-8", "label": "English", "keyboard": "us"},
     "de": {"locale": "de_DE.UTF-8", "label": "Deutsch", "keyboard": "de"},