[lint] Limit unneccessarily broad except clauses

Add exception qualifier(s) to bare except clauses swallowing exceptions.

discord/ext/commands/bot.py

@@ -195,13 +195,13 @@ class BotBase(GroupMixin):
         for extension in tuple(self.extensions):
             try:
                 self.unload_extension(extension)
-            except:
+            except Exception:
                 pass
 
         for cog in tuple(self.cogs):
             try:
                 self.remove_cog(cog)
-            except:
+            except Exception:
                 pass
 
         await super().close()
@@ -759,7 +759,7 @@ class BotBase(GroupMixin):
         else:
             try:
                 func(self)
-            except:
+            except Exception:
                 pass
         finally:
             # finally remove the import..

discord/ext/commands/core.py

@@ -240,7 +240,7 @@ class Command:
 
         try:
             module = converter.__module__
-        except:
+        except AttributeError:
             pass
         else:
             if module.startswith('discord.') and not module.endswith('converter'):