[pre-commit.ci] pre-commit autoupdate (#25)

* [pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 20.8b1 → 21.4b0](psf/black@20.8b1...21.4b0)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -4,7 +4,7 @@ repos:
     hooks:
       - id: isort
   - repo: https://github.com/psf/black
-    rev: 20.8b1
+    rev: 21.4b0
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/flake8

napari_plugin_engine/manager.py

@@ -406,7 +406,7 @@ def _register_dict(
         return self.register(namespace, name)
 
     def get_name(self, plugin):
-        """ Return name for registered plugin or ``None`` if not registered. """
+        """Return name for registered plugin or ``None`` if not registered."""
         for name, val in self.plugins.items():
             if plugin == val:
                 return name
@@ -662,7 +662,7 @@ def check_pending(self):
                         )
 
     def get_hookcallers(self, plugin: Any) -> Optional[List[HookCaller]]:
-        """ get all hook callers for the specified plugin. """
+        """get all hook callers for the specified plugin."""
         return self._plugin2hookcallers.get(plugin)
 
     def add_hookcall_monitoring(
@@ -706,7 +706,7 @@ def undo():
         return undo
 
     def enable_tracing(self):
-        """Enable tracing of hook calls and return an undo function. """
+        """Enable tracing of hook calls and return an undo function."""
         hooktrace = self.trace.root.get("hook")
 
         def before(hook_name, methods, kwargs):