Spaces in strings

One added space + one removed space.

src/rpcwallet.cpp

@@ -632,7 +632,7 @@ Value sendmany(const Array& params, bool fHelp)
     {
         CBitcoinAddress address(s.name_);
         if (!address.IsValid())
-            throw JSONRPCError(-5, string("Invalid Bitcoin address:")+s.name_);
+            throw JSONRPCError(-5, string("Invalid Bitcoin address: ")+s.name_);
 
         if (setAddress.count(address))
             throw JSONRPCError(-8, string("Invalid parameter, duplicated address: ")+s.name_);