CI: Fix flake8 errors added due to flake8 updates

Author: achimnol

aiotools/context.py

@@ -120,7 +120,7 @@ async def __aexit__(self, exc_type, exc_value, tb):
                     return False
                 # If this is a purely new exception, raise the new one.
                 raise
-            except:
+            except Exception:
                 # If the finalization part of the generator throws a new
                 # exception, re-raise it.
                 if sys.exc_info()[1] is exc_value:

aiotools/server.py

@@ -51,7 +51,7 @@ async def _work():
     try:
         task = _work()
         loop.run_until_complete(task.__anext__())
-    except:
+    except Exception:
         log.exception("Unexpected error during worker initialization!")
         # interrupt the main loop.
         os.killpg(os.getpgid(0), signal.SIGINT)

tests/test_context.py

@@ -283,7 +283,7 @@ async def simple_ctx(msg):
         try:
             await asyncio.sleep(0)
             yield msg
-        except:
+        except Exception:
             await asyncio.sleep(0)
             # exception is replaced
             raise ValueError('bomb2')