fix flakes errors

Author: hpk42

pluggy.py

@@ -118,7 +118,6 @@ class HookimplMarker:
     You can instantiate with a project_name to get a decorator.
     Calling PluginManager.register later will discover all marked functions
     if the PluginManager uses the same project_name.
-
     """
     def __init__(self, project_name):
         self.project_name = project_name
@@ -414,7 +413,7 @@ def parse_hookimpl_opts(self, plugin, name):
             # false positive
             res = None
         elif res is None and self._implprefix and name.startswith(self._implprefix):
-           res = {}
+            res = {}
         return res
 
     def parse_hookspec_opts(self, module_or_class, name):

test_pluggy.py

@@ -535,6 +535,7 @@ def he_method1(self):
 
     def test_prefix_hookimpl(self):
         pm = PluginManager(hookspec.project_name, "hello_")
+
         class HookSpec:
             @hookspec
             def hello_myhook(self, arg1):
@@ -551,6 +552,7 @@ def hello_myhook(self, arg1):
         results = pm.hook.hello_myhook(arg1=17)
         assert results == [18, 18]
 
+
 def test_parse_hookimpl_override():
     class MyPluginManager(PluginManager):
         def parse_hookimpl_opts(self, module_or_class, name):
@@ -572,11 +574,11 @@ class Spec:
         @hookspec
         def x1meth(self):
             pass
+
         @hookspec
         def x1meth2(self):
             pass
 
-
     pm = MyPluginManager(hookspec.project_name)
     pm.register(Plugin())
     pm.add_hookspecs(Spec)