lib/net/ldap/connections.rb: use ** to pass a keyword parameter #350
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In Socket.tcp call is passed a keyword parameter as is and while I've
been testing a library that relies on it I got the following warning:
net/ldap/connection.rb:709: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
In ruby 2.7 is preferred to use ** to pass keyword arguments in method's
call.