Use removeprefix/removesuffix instead of incorrect lstrip/rstrip calls (#3109)

archinstall/lib/installer.py

@@ -1633,7 +1633,7 @@ Exec = /bin/sh -c "{hook_command}"
 		last_execution_time = SysCommand(
 			f"systemctl show --property=ActiveEnterTimestamp --no-pager {service_name}",
 			environment_vars={'SYSTEMD_COLORS': '0'}
-		).decode().lstrip('ActiveEnterTimestamp=')
+		).decode().removeprefix('ActiveEnterTimestamp=')
 
 		if not last_execution_time:
 			return None

archinstall/lib/models/mirrors.py

@@ -254,7 +254,7 @@ class MirrorListHandler:
 
 				url = line.removeprefix('Server = ')
 				mirror_entry = MirrorStatusEntryV3(
-					url=url.rstrip('$repo/os/$arch'),
+					url=url.removesuffix('$repo/os/$arch'),
 					protocol=urllib.parse.urlparse(url).scheme,
 					active=True,
 					country=current_region or 'Worldwide',