A couple of tweaks to clarify some type hints

src/IRCChannel.py

@@ -3,6 +3,7 @@ from src import EventManager, IRCBot, IRCBuffer, IRCObject, IRCServer, IRCUser
 from src import utils
 
 class Channel(IRCObject.Object):
+    name = ""
     def __init__(self, name: str, id, server: "IRCServer.Server",
             bot: "IRCBot.Bot"):
         self.name = utils.irc.lower(server.case_mapping, name)

src/IRCServer.py

@@ -173,7 +173,10 @@ class Server(IRCObject.Object):
         self.nickname = nickname
         self.nickname_lower = utils.irc.lower(self.case_mapping, nickname)
     def is_own_nickname(self, nickname: str) -> bool:
-        return utils.irc.equals(self.case_mapping, nickname, self.nickname)
+        if self.nickname == None:
+            return False
+        return utils.irc.equals(self.case_mapping, nickname,
+            typing.cast(str, self.nickname))
 
     def add_own_mode(self, mode: str, arg: str=None):
         self.own_modes[mode] = arg

src/utils/irc.py

@@ -80,7 +80,7 @@ def message_tag_unescape(s):
     return _multi_replace(s, MESSAGE_TAG_ESCAPED, MESSAGE_TAG_UNESCAPED)
 
 def parse_line(line: str) -> IRCLine:
-    tags = {}
+    tags = {} # type: typing.Dict[str, typing.Any]
     prefix = None # type: typing.Optional[IRCHostmask]
     command = None
 
@@ -108,9 +108,7 @@ def parse_line(line: str) -> IRCLine:
         prefix_str, line = line[1:].split(" ", 1)
         prefix = seperate_hostmask(prefix_str)
 
-    args = []
     command, sep, line = line.partition(" ")
-    if sep:
     args = line.split(" ")
 
     if arbitrary: