qvm_device: simplify options string, use -o for all options

Drop the --ro special case in _build_options_str: output
-o read-only=yes like any other option instead.

Author: Jayant-kernel

qubesadmin/tests/tools/qvm_device.py

@@ -379,7 +379,7 @@ def test_032_assign_ask_and_options(self):
                 app=self.app)
             self.assertIn('Assigned.', buf.getvalue())
             self.assertIn('now restart domain', buf.getvalue())
-            self.assertIn('--ro', buf.getvalue())
+            self.assertIn('-o read-only=yes', buf.getvalue())
         self.assertAllCalled()
 
     def test_032b_assign_option_in_hint(self):

qubesadmin/tools/qvm_device.py

@@ -358,13 +358,7 @@ def assign_device(args):
 
 def _build_options_str(options):
     """Build CLI option flags string from assignment options dict."""
-    parts = []
-    if options.get("read-only", "").lower() in ("yes", "true", "1"):
-        parts.append("--ro")
-    for key, value in options.items():
-        if key == "read-only":
-            continue
-        parts.append(f"-o {key}={value}")
+    parts = [f"-o {key}={value}" for key, value in options.items()]
     return (" " + " ".join(parts)) if parts else ""