Work on Retroarch Steam executable

src/importer/sources/retroarch_source.py

@@ -26,8 +26,6 @@ from pathlib import Path
 from time import time
 from typing import NamedTuple
 
-from urllib.parse import quote
-
 from src import shared
 from src.errors.friendly_error import FriendlyError
 from src.game import Game
@@ -223,13 +221,20 @@ class RetroarchSource(Source):
         """
 
         self.locations.config.resolve()
-        args = f'-L "{core_path}" "{rom_path}"'
+        args = f"-L '{core_path}' '{rom_path}'"
 
         # Steam RetroArch
         # (Must check before Flatpak, because Steam itself can be installed as one)
         if self.locations.config.root.parent.parent.name == "steamapps":
-            uri = "steam://run/1118310//" + quote(args) + "/"
+            # TODO fix the RetroArch Steam arguments
-            return f"xdg-open {uri}"
+            # It seems that the space after "-L" is parsed as the value for that arg.
+            # The URI protocol is proprietary, a community doc is available:
+            # https://developer.valvesoftware.com/wiki/Steam_browser_protocol
+            # ... But it doesn't sepcify HOW the args should be formatted.
+            # Space delimited? Quoted individually? URL-Encoded?
+            # I don't know. It no workie :D
+            uri = f"steam://run/1118310//{args}/"
+            return f'xdg-open "{uri}"'
 
         # Flatpak RetroArch
         if self.locations.config.root.is_relative_to(shared.flatpak_dir):