Precommit: formatting fixes after Black update

src/Mod/AddonManager/Widgets/addonmanager_widget_progress_bar.py

@@ -53,7 +53,6 @@ _TOTAL_INCREMENTS = 1000
 
 
 class WidgetProgressBar(QtWidgets.QWidget):
-
     """A multipart progress bar widget, including a stop button and a status label. Defaults to a
     single range with 100 increments, but can be configured with any number of major and minor
     ranges. Clicking the stop button will emit a signal, but does not otherwise affect the

src/Mod/AddonManager/addonmanager_readme_controller.py

@@ -45,7 +45,6 @@ class ReadmeDataType(IntEnum):
 
 
 class ReadmeController(QtCore.QObject):
-
     """A class that can provide README data from an Addon, possibly loading external resources such
     as images"""
 

src/Mod/AddonManager/manage_python_dependencies.py

@@ -117,7 +117,6 @@ def call_pip(args) -> List[str]:
 
 
 class PythonPackageManager:
-
     """A GUI-based pip interface allowing packages to be updated, either individually or all at
     once."""