Do not allow empty text MultiAddrs, they must always start with a forward slash

Author: ntninja

multiaddr/multiaddr.py

@@ -188,8 +188,8 @@ def decapsulate(self, other):
         For example:
             /ip4/1.2.3.4/tcp/80 decapsulate /ip4/1.2.3.4 = /tcp/80
         """
-        s1 = str(self)
-        s2 = str(other)
+        s1 = self.to_bytes()
+        s2 = other.to_bytes()
         try:
             idx = s1.rindex(s2)
         except ValueError:

multiaddr/transforms.py

@@ -14,9 +14,6 @@
 
 
 def string_to_bytes(string):
-    if not string:
-        return b''
-
     bs = []
     for proto, codec, value in string_iter(string):
         bs.append(varint.encode(proto.code))