Fix channel comparison with # prefix

Author: pbaranay

slackclient/_channel.py

@@ -6,7 +6,7 @@ def __init__(self, server, name, channel_id, members=None):
         self.members = [] if members is None else members
 
     def __eq__(self, compare_str):
-        if self.name == compare_str or self.name == "#" + compare_str or self.id == compare_str:
+        if self.name == compare_str or "#" + self.name == compare_str or self.id == compare_str:
             return True
         else:
             return False