minor: Sort descriptions in _descriptions.py

Author: stephane-caron

examples/show_in_mujoco.py

@@ -20,7 +20,7 @@
     import mujoco_viewer
 except ImportError as e:
     raise ImportError(
-        "MuJoCo viewer not found, " "try `pip install mujoco-python-viewer`"
+        "MuJoCo viewer not found, try `pip install mujoco-python-viewer`"
     ) from e
 
 from robot_descriptions.loaders.mujoco import load_robot_description

robot_descriptions/_descriptions.py

@@ -173,6 +173,7 @@ def has_urdf(self) -> bool:
         Format.URDF, tags={"dual_arm", "mobile_manipulator"}
     ),
     "r2_description": Description(Format.URDF, tags={"humanoid"}),
+    "rby1_description": Description(Format.URDF, tags={"mobile_manipulator"}),
     "reachy_description": Description(
         Format.URDF, tags={"mobile_manipulator"}
     ),
@@ -236,9 +237,8 @@ def has_urdf(self) -> bool:
     "wl_p311d_description": Description(Format.URDF, tags={"quadruped"}),
     "wl_p311e_description": Description(Format.URDF, tags={"quadruped"}),
     "xarm7_mj_description": Description(Format.MJCF, tags={"arm"}),
-    "yam_mj_description": Description(Format.MJCF, tags={"arm"}),
     "yam_description": Description(Format.URDF, tags={"arm"}),
-    "rby1_description": Description(Format.URDF, tags={"mobile_manipulator"}),
+    "yam_mj_description": Description(Format.MJCF, tags={"arm"}),
     "yumi_description": Description(Format.URDF, tags={"dual_arm"}),
     "z1_description": Description(Format.URDF, tags={"arm"}),
     "z1_mj_description": Description(Format.MJCF, tags={"arm"}),