zeroconf: add whitespace around operator

hgext/zeroconf/Zeroconf.py

@@ -490,7 +490,8 b' class DNSIncoming(object):'
         """Reads header portion of packet"""
         format = '!HHHHHH'
         length = struct.calcsize(format)
-        info = struct.unpack(format, self.data[self.offset:self.offset+length])
+        info = struct.unpack(format,
+                             self.data[self.offset:self.offset + length])
         self.offset += length
 
         self.id = info[0]
@@ -520,7 +521,8 b' class DNSIncoming(object):'
         """Reads an integer from the packet"""
         format = '!I'
         length = struct.calcsize(format)
-        info = struct.unpack(format, self.data[self.offset:self.offset+length])
+        info = struct.unpack(format,
+                             self.data[self.offset:self.offset + length])
         self.offset += length
         return info[0]
 
@@ -534,7 +536,8 b' class DNSIncoming(object):'
         """Reads a string of a given length from the packet"""
         format = '!' + str(len) + 's'
         length = struct.calcsize(format)
-        info = struct.unpack(format, self.data[self.offset:self.offset+length])
+        info = struct.unpack(format,
+                             self.data[self.offset:self.offset + length])
         self.offset += length
         return info[0]
 
@@ -542,7 +545,8 b' class DNSIncoming(object):'
         """Reads an unsigned short from the packet"""
         format = '!H'
         length = struct.calcsize(format)
-        info = struct.unpack(format, self.data[self.offset:self.offset+length])
+        info = struct.unpack(format,
+                             self.data[self.offset:self.offset + length])
         self.offset += length
         return info[0]