Addon Manager: Minor translation fixes

src/Mod/AddonManager/AddonManager.py

@@ -299,8 +299,9 @@ class CommandAddonManager:
                             FreeCAD.Console.PrintWarning(
                                 translate(
                                     "AddonsInstaller",
-                                    "Worker process {} is taking a long time to stop...\n",
+                                    "Worker process {} is taking a long time to stop...",
                                 ).format(worker)
+                                + "\n"
                             )
 
     def determine_cache_update_status(self) -> None:

src/Mod/AddonManager/NetworkManager.py

@@ -90,7 +90,7 @@ except ImportError:
         FreeCAD.Console.PrintError(
             translate(
                 "AddonsInstaller",
-                'Could not import QtNetwork -- it does not appear to be installed on your system. Your provider may have a package for this dependency (often called e.g. "python3-pyside2.qtnetwork", for example)',
+                'Could not import QtNetwork -- it does not appear to be installed on your system. Your provider may have a package for this dependency (often called "python3-pyside2.qtnetwork")',
             )
             + "\n"
         )

src/Mod/AddonManager/addonmanager_installer_gui.py

@@ -274,8 +274,9 @@ class AddonInstallerGUI(QtCore.QObject):
                 FreeCAD.Console.PrintWarning(
                     translate(
                         "AddonsInstaller",
-                        "Optional dependency on {} ignored because it is not in the allow-list\n",
+                        "Optional dependency on {} ignored because it is not in the allow-list",
                     ).format(dep)
+                    + "\n"
                 )
         missing.python_optional = good_packages