diff --git a/aider/args.py b/aider/args.py
index a447eea23..ca287e712 100644
--- a/aider/args.py
+++ b/aider/args.py
@@ -826,7 +826,10 @@ def get_parser(default_config_files, git_root):
         "--notifications-command",
         metavar="COMMAND",
         default=None,
-        help="Specify a command to run for notifications instead of the terminal bell. If not specified, a default command for your OS may be used.",
+        help=(
+            "Specify a command to run for notifications instead of the terminal bell. If not"
+            " specified, a default command for your OS may be used."
+        ),
     )
     group.add_argument(
         "--detect-urls",
diff --git a/aider/io.py b/aider/io.py
index eadebb3e6..f71a2c806 100644
--- a/aider/io.py
+++ b/aider/io.py
@@ -962,11 +962,14 @@ class InputOutput:
     def get_default_notification_command(self):
         """Return a default notification command based on the operating system."""
         import platform
-        
+
         system = platform.system()
-        
+
         if system == "Darwin":  # macOS
-            return "osascript -e 'display notification \"Aider is waiting for your input\" with title \"Aider\"'"
+            return (
+                'osascript -e \'display notification "Aider is waiting for your input" with title'
+                ' "Aider"\''
+            )
         elif system == "Linux":
             # Check for common Linux notification tools
             for cmd in ["notify-send", "zenity"]:
@@ -978,8 +981,13 @@ class InputOutput:
             return None  # No known notification tool found
         elif system == "Windows":
             # PowerShell notification
-            return "powershell -command \"[System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms'); [System.Windows.Forms.MessageBox]::Show('Aider is waiting for your input', 'Aider')\""
-        
+            return (
+                "powershell -command"
+                " \"[System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms');"
+                " [System.Windows.Forms.MessageBox]::Show('Aider is waiting for your input',"
+                " 'Aider')\""
+            )
+
         return None  # Unknown system
 
     def ring_bell(self):